Search results

Showing 1 – 50 of 86 results.

Curated

Restricted

Assessing the Delivery of Community Policing Services in Ada County, Idaho, 2002 (ICPSR 4152)

Released/updated on: 2006-01-31

Geographic coverage: United States, Idaho

Time period: 2002-03-01--2002-04-01

This study was conducted to explore the ways that enable the Ada County Sheriff's Office (ACSO) to examine its behavior in five areas that embody its adoption of community policing elements: (1) periodic assessments of citizens' perceptions of crime and police services, (2) substation policing, (3) patrol based in problem-oriented identification and resolution, (4) performance evaluation in a community-oriented policing (COP)/problem-oriented policing (POP) environment, and (5) the building of community partnerships. The researchers strived to obtain both transitive and recursive effects. One of the goals of this project was to facilitate the ACSO's efforts toward self-reflection, and by doing so, become a learning organization. In order to do this, data were collected, via survey, from both citizens of Ada County and from deputies employed by the ACSO. The citizen survey was a random, stratified telephone survey, using CATI technology, administered to 761 Ada County residents who received patrol services from the ACSO. The survey was designed to correspond to a similar survey conducted in 1997 (DEVELOPING A PROBLEM-ORIENTED POLICING MODEL IN ADA COUNTY, IDAHO, 1997-1998 [ICPSR 2654]) in the same area regarding similar issues: citizens' fear of crime, citizens' satisfaction with police services, the extent of public knowledge about and interest in ideas of community policing, citizens' police service needs, sheriff's office service needs and their views of the community policing mandate. The deputy survey was a self-enumerated questionnaire administered to 54 deputies and sergeants of the ACSO during a pre-arranged, regular monthly training. This survey consisted of four sections: the deputies' perception of crime problems, rating of the deputy performance evaluation, ethical issues in policing, and departmental relations.

Curated

Assessing the Validity and Reliability of National Data on Citizen Complaints about Police Use of Force, 2003 and 2007 (ICPSR 36042)

Released/updated on: 2017-06-30

Geographic coverage: United States

These data are part of the NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed excepted as noted below. All direct identifiers have been removed and replaced with text enclosed in square brackets (e.g.[MASKED]). Due to the masking of select information, variables/content described in the data documentation may not actually be available as part of the collection. Users should consult the investigator(s) if further information is needed.

This collection is one part of the Department of Justice's response to 42 USC 14142, a law which requires the U.S. Attorney General to 1) "acquire data about the use of excessive force by law enforcement officers" and 2) "publish an annual summary of the data." Researchers compared agency-level data reported in the 2003 (ICPSR 4411) and 2007 (ICPSR 31161) waves of the Law Enforcement Management and Administrative Statistics (LEMAS) surveys with available external sources including publicly available reports and direct contact with agency personnel. The purpose of this study was to assess validity and reliability of the available agency-level reported data on citizen complaints about police use of force.

Curated

Partially restricted

The Benefits of Body-Worn Cameras: New Findings from a Randomized Controlled Trial at the Las Vegas Metropolitan Police Department, Nevada, 2014-2015 (ICPSR 37048)

Released/updated on: 2018-10-30

Geographic coverage: Las Vegas, Nevada

Time period: 2014-02-01--2015-09-01

These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.

This study reports the findings of a randomized controlled trial (RCT) involving more than 400 police officers and the use of body-worn cameras (BWC) in the Las Vegas Metropolitan Police Department (LVMPD). Officers were surveyed before and after the trial, and a random sample was interviewed to assess their level of comfort with technology, perceptions of self, civilians, other officers, and the use of BWCs. Information was gathered during ride-alongs with BWC officers and from a review of BWC videos.

The collection includes 2 SPSS data files, 4 Excel data files, and 2 files containing aggregated treatment groups and rank-and-treatment groups, in Stata, Excel, and CSV format:

SPSS: officer-survey---pretest.sav (n=422; 30 variables)
SPSS: officer-survey---posttest2.sav (n=95; 33 variables)
Excel: officer-interviews---form-a.xlsx (n=23; 52 variables)
Excel: officer-interviews---form-b.xlsx (n=27; 52 variables)
Excel: ride-along-observations.xlsx (n=72; 20 variables)
Excel: video-review-data.xlsx (n=53; 21 variables)
Stata: hours-and-compensation-rollup-to-treatment-group.dta (n=4; 42 variables)
Excel: hours-and-compensation-rollup-to-treatment-group.xls (n=4; 42 variables)
CSV: hours-and-compensation-rollup-to-treatment-group.csv (n=4; 42 variables)
Stata: hours-and-compensation-rollup-to-rank-and-treatment-group.dta (n=12; 43 variables)
Excel: hours-and-compensation-rollup-to-rank-and-treatment-group.xls (n=12; 43 variables)
CSV: hours-and-compensation-rollup-to-rank-and-treatment-group.csv (n=12; 43 variables)

Curated

Boston Police Department Domestic Violence Research Project, 1993-1994 (ICPSR 6483)

Released/updated on: 2006-01-12

Geographic coverage: United States, Massachusetts, Boston

The Domestic Violence Research Project was a pilot study designed to examine the dynamics of domestic violence within two of the ten police districts that comprise the city of Boston. The objectives were to collect data on domestic violence in greater detail than previously possible, conduct various analyses on this information, and determine how the findings could best be used to improve the police, prosecutorial, and social service responses to domestic violence. Data for 1993 are a stratified random sample of reported domestic violence incidents occurring throughout the year. The sample represents approximately 27 percent of the domestic violence incidents reported in 1993 for the two districts studied, B3 and D4. The 1994 data include all reported incidents occurring in the two districts during the period May to July. After the incident selection process was completed, data were collected from police incident reports, follow-up investigation reports, criminal history reports, and court dockets. Variables include arrest offenses, time of incident, location of incident, witnesses (including children), nature and extent of injuries, drug and alcohol use, history of similar incidents, whether there were restraining orders in effect, and basic demographic information on victims and offenders. Criminal history information was coded into five distinct categories: (1) violent offenses, (2) nonviolent offenses, (3) domestic violence offenses, (4) drug/alcohol offenses, and (5) firearms offenses.

Curated

Census of Law Enforcement Gang Units, 2007 (ICPSR 29503)

Released/updated on: 2011-03-22

Geographic coverage: United States

The 2007 Census of Law Enforcement Gang Units (CLEGU) collected data from all state and local law enforcement agencies with 100 or more sworn officers and at least one officer dedicated solely to addressing gangs and gang activities. Law enforcement agencies are often the first line of response to the gang problems experienced across the country and are a critical component of most anti-gang initiatives. One way for law enforcement agencies to address gang-related problems is to form specialized gang units. The consolidation of an agency's gang enforcement activities and resources into a single unit can allow gang unit officers to develop specific expertise and technical skills related to local gang characteristics and behaviors and gang prevention and suppression. No prior studies have collected data regarding the organization and operations of law enforcement gang units nationwide, the types of gang prevention tactics employed, or the characteristics and training of gang unit officers. This CLEGU collected data on the operations, workload, policies, and procedures of gang units in large state and local law enforcement agencies in order to expand knowledge of gang prevention and enforcement tactics. The CLEGU also collected summary measures of gang activity in the agencies' jurisdictions to allow for comparison across jurisdictions with similar gang problems.

Curated

Census of Law Enforcement Training Academies, 2002: [United States] (ICPSR 4255)

Released/updated on: 2005-06-09

Geographic coverage: United States

The 2002 Census of Law Enforcement Training Academies (CLETA02) was the first effort by the Bureau of Justice Statistics (BJS) to collect information from law enforcement training academies across the United States. The CLETA02 included all currently operating academies that provided basic law enforcement training. Academies that provided only in-service training, corrections/detention training, or other special types of training were excluded. Data were collected on personnel, expenditures, facilities, equipment, trainees, training curricula, and a variety of special topic areas. As of year-end 2002, a total of 626 law enforcement academies operating in the United States offered basic law enforcement training to individuals recruited or seeking to become law enforcement officers.

Curated

Simple Crosstabs

Census of Law Enforcement Training Academies, 2018 (ICPSR 38250)

Released/updated on: 2021-11-30

Geographic coverage: United States

In 2018, there were 681 state and local law enforcement training academies that provided basic training instruction to 59,511 recruits. As part of the 2018 Census of Law Enforcement Training Academies (CLETA), respondents provided general information about the academies' facilities, resources, programs, and staff. The core curricula subject areas and hours dedicated to each topic, as well as training offered in some special topics, were also included. The collection included information about recruit demographics, completion, and reasons for non-completion of basic training. BJS administered previous versions of the CLETA in 2002, 2006, and 2013.

Curated

Simple Crosstabs

Census of Law Enforcement Training Academies, 2022 (ICPSR 39295)

Released/updated on: 2025-05-13

Geographic coverage: United States

In 2022, there were 747 state and local law enforcement training academies that provided basic training instruction to 60,214 recruits. As part of the 2022 CLETA, respondents provided general information about the academies' resources, programs, recruits and staff. The core curricula subject areas and hours dedicated to each topic, as well as training offered in some special topics, were also included. The collection included information about recruit demographics, completion, and reasons for non-completion of basic training. BJS administered previous versions of the CLETA in 2002, 2006, 2013, and 2018.

Curated

Census of Public Defender Offices: County-Based and Local Offices, 2007 (ICPSR 29502)

Released/updated on: 2011-05-13

Geographic coverage: United States

The Bureau of Justice Statistics' (BJS) 2007 Census of Public Defender Offices (CPDO) collected data from public defender offices located across 49 states and the District of Columbia. Public defender offices are one of three methods through which states and localities ensure that indigent defendants are granted the Sixth and Fourteenth Amendment right to counsel. (In addition to defender offices, indigent defense services may also be provided by court-assigned private counsel or by a contract system in which private attorneys contractually agree to take on a specified number of indigent defendants or indigent defense cases.) Public defender offices have a salaried staff of full- or part-time attorneys who represent indigent defendants and are employed as direct government employees or through a public, nonprofit organization. Public defenders play an important role in the United States criminal justice system. Data from prior BJS surveys on indigent defense representation indicate that most criminal defendants rely on some form of publicly provided defense counsel, primarily public defenders. Although the United States Supreme Court has mandated that the states provide counsel for indigent persons accused of crime, documentation on the nature and provision of these services has not been readily available. States have devised various systems, rules of organization, and funding mechanisms for indigent defense programs. While the operation and funding of public defender offices varies across states, public defender offices can be generally classified as being part of either a state program or a county-based system. The 22 state public defender programs functioned entirely under the direction of a central administrative office that funded and administered all the public defender offices in the state. For the 28 states with county-based offices, indigent defense services were administered at the county or local jurisdictional level and funded principally by the county or through a combination of county and state funds. The CPDO collected data from both state- and county-based offices. All public defender offices that were principally funded by state or local governments and provided general criminal defense services, conflict services, or capital case representation were within the scope of the study. Federal public defender offices and offices that provided primarily contract or assigned counsel services with private attorneys were excluded from the data collection. In addition, public defender offices that were principally funded by a tribal government, or provided primarily appellate or juvenile services were outside the scope of the project and were also excluded. The CPDO gathered information on public defender office staffing, expenditures, attorney training, standards and guidelines, and caseloads, including the number and type of cases received by the offices. The data collected by the CPDO can be compared to and analyzed against many of the existing national standards for the provision of indigent defense services.

Curated

Census of Public Defender Offices: State Programs, 2007 (ICPSR 29501)

Released/updated on: 2011-05-13

Geographic coverage: United States

Curated

Census of State and Local Law Enforcement Agencies (CSLLEA), 2000: [United States] (ICPSR 3484)

Released/updated on: 2009-07-08

Geographic coverage: United States

To ensure an accurate sampling frame for its Law Enforcement Management and Administrative Statistics (LEMAS) survey, the Bureau of Justice Statistics periodically sponsors a census of the nation's state and local law enforcement agencies. This census, known as the Directory Survey, includes all state and local law enforcement agencies that are publicly funded and employ at least one full-time or part-time sworn officer with general arrest powers. As in previous years, the 2000 Directory Survey collected data on the number of sworn and nonsworn personnel employed by each agency, including both full-time and part-time employees. The pay period that included June 30, 2000, was the reference date for all personnel data. A 97.4 percent response rate was obtained from the 17,784 state and local law enforcement agencies operating in the United States. This data collection contains June 2000 data from the fourth Directory Survey. Previous directory censuses were conducted in 1986 (DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1986: [UNITED STATES] [ICPSR 8696]), 1992 (DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1992: [UNITED STATES] [ICPSR 2266]), and 1996 (DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1996: [UNITED STATES] [ICPSR 2260]). Variables include personnel totals, type of government, type of agency, and whether the agency had the legal authority to hold a person beyond arraignment for 48 or more hours.

Curated

Census of State and Local Law Enforcement Agencies (CSLLEA), 2004 [United States] (ICPSR 28001)

Released/updated on: 2011-05-23

Geographic coverage: United States

To ensure an accurate sampling frame for its Law Enforcement Management and Administrative Statistics (LEMAS) survey, the Bureau of Justice Statistics sponsors a census of the nation's state and local law enforcement agencies, known as the Directory Survey. This census, which is conducted every four years, includes all state and local law enforcement agencies operating nationwide that are publicly funded and employ at least one full-time or part-time sworn officer with general arrest powers. As in previous years, the 2004 census collected data on the number of sworn and nonsworn personnel employed by each agency, including both full-time and part-time employees. The pay period that included September 30, 2004, was the reference date for all personnel data. Variables include personnel totals, type of government, type of agency, and whether the agency had the legal authority to hold a person beyond arraignment for 48 or more hours. Previous censuses were conducted in 1986 (DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1986: [UNITED STATES] [ICPSR 8696]), 1992 (DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1992: [UNITED STATES] [ICPSR 2266]), 1996 (DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1996: [UNITED STATES] [ICPSR 2260]), and 2000 (Census of State and Local Law Enforcement Agencies (CSLLEA), 2000: [United States] [ICPSR 3484]).

Curated

Census of State and Local Law Enforcement Agencies (CSLLEA), 2008 (ICPSR 27681)

Released/updated on: 2011-08-03

Geographic coverage: United States

The BJS Census of State and Local Law Enforcement Agencies (CSLLEA) is conducted every 4 years to provide a complete enumeration of agencies and their employees. Employment data are reported by agencies for sworn and nonsworn (civilian) personnel and, within these categories, by full-time or part-time status. The pay period that included September 30, 2008, was the reference date for all personnel data. Agencies also complete a checklist of functions they regularly perform, or have primary responsibility for, within the following areas: patrol and response, criminal investigation, traffic and vehicle-related functions, detention-related functions, court-related functions, special public safety functions (e.g., animal control), task force participation, and specialized functions (e.g., search and rescue). The CSLLEA provides national data on the number of state and local law enforcement agencies and employees for local police departments, sheriffs' offices, state law enforcement agencies, and special jurisdiction agencies. It also serves as the sampling frame for BJS surveys of law enforcement agencies.

Curated

Simple Crosstabs

Census of State and Local Law Enforcement Agencies (CSLLEA), 2018 (ICPSR 38771)

Released/updated on: 2023-05-30

Geographic coverage: United States

The BJS Census of State and Local Law Enforcement Agencies (CSLLEA) is conducted every 4 years to provide a complete enumeration of agencies and their employees. Employment data are reported by agencies for sworn and nonsworn (civilian) personnel and, within these categories, by full-time or part-time status. The pay period that included June 30, 2018, was the reference date for personnel data. Agencies also complete a checklist of functions they regularly perform, or have primary responsibility for, within the following areas: patrol and response, criminal investigation, traffic and vehicle-related functions, detention-related functions, court-related functions, forensic services, special public safety functions (e.g., animal control), task force participation, and specialized functions (e.g., search and rescue). The CSLLEA provides national data on the number of state and local law enforcement agencies and employees for local police departments, sheriffs' offices, state law enforcement agencies, and special jurisdiction agencies. It also serves as the sampling frame for BJS surveys of law enforcement agencies.

Curated

Census of State and Local Law Enforcement Training Academies, 2006 (ICPSR 27262)

Released/updated on: 2012-09-13

Geographic coverage: United States

As of year-end 2006 a total of 648 state and local law enforcement academies were providing basic training to entry-level recruits in the United States. State agencies approved 98 percent of these academies. This data collection describes the academies in terms of their personnel, expenditures, facilities, curricula, and trainees using data from the 2006 Census of State and Local Law Enforcement Training Academies (CLETA) sponsored by the Bureau of Justice Statistics (BJS). The 2006 CLETA, like the initial 2002 study, collected data from all state and local academies that provided basic law enforcement training. Academies that provided only in-service training, corrections and detention training, or other special types of training were excluded. Federal training academies were also excluded.

Curated

Simple Crosstabs

Census of State and Local Law Enforcement Training Academies, 2013 (ICPSR 36764)

Released/updated on: 2018-12-12

Geographic coverage: United States

From 2011 to 2013, a total of 664 state and local law enforcement academies provided basic training to entry-level officer recruits in the United States. During this period, more than 135,000 recruits (45,000 per year) entered a basic training program, and 86 percent completed the program successfully. This completion rate was the same as was observed for the 57,000 recruits who entered training programs in 2005. This data collection describes basic training programs for new recruits based on their content, instructors, and teaching methods. It also describes the recruits' demographics, completion rates, and reasons for failure. The data describing recruits cover those entering basic training programs from 2011 to 2013. The data describing academies are based on 2013, the latest year referenced in the survey. Like prior BJS studies conducted in 2002 and 2006, the 2013 CLETA collected data from all state and local academies that provided basic law enforcement training. Academies that provided only in-service, corrections and detention, or other specialized training were excluded. Federal training academies were also excluded. Any on-the-job training received by recruits subsequent to their academy training is not covered.

Curated

Simple Crosstabs

Census of Tribal Law Enforcement Agencies, 2018 (ICPSR 38938)

Released/updated on: 2024-01-30

Geographic coverage: United States

Time period: 2018-01-01--2018-12-31

The Census of Tribal Law Enforcement Agencies (CTLEA) is the first complete enumeration of tribal law enforcement agencies authorized to issue citations and make arrests for crime committed in Indian country. The CTLEA gathers administrative and operational information from tribally operated police departments, Bureau of Indian Affairs (BIA) police, and the Alaska Village Public Safety Officer's (VPSO) program operating in the United States during 2018. The CTLEA helps fulfill the Bureau of Justice Statistics' legislative mandate under the Tribal Law and Order Act of 2010 (TLOA; P.L. 111-211, 124 Stat. 2258 Section 251(b)) to establish and implement a tribal crime data collection system.

Data for the CTLEA were collected by NORC, at the University of Chicago, in collaboration with the International Association of Chiefs of Police (IACP) Indian Country section. The CTLEA consists of two surveys specific to tribally operated law enforcement agencies and the BIA police departments. The Alaska VPSO program is sponsored and funded by the Alaska State Troopers, which completed the tribally operated law enforcement agency questionnaire on behalf of all the VPSOs. Due to the unique territorial and criminal jurisdiction in Alaska Native Villages, only two tribally operated law enforcement agencies (the Chickaloon and Metlakatla Indian Community) met the eligibility criteria to be included in the CTLEA. Data for the 2019 CTLEA were collected through mail, email, and telephone nonresponse follow-up. Data on the number and type of tribally operated law enforcement and BIA agencies were obtained from all eligible federally recognized tribes. The final universe of eligible respondents included 234 tribally operated law enforcement agencies and the Alaska VPSO program, of which 215 (91.9%) participated in the survey. The 23 BIA police departments operating in the United States completed the survey.

Curated

Communication of Innovation in Policing in the United States, 1996 (ICPSR 2480)

Released/updated on: 2005-11-04

Geographic coverage: United States

These data were collected to examine the patterns of communication among police planners in the United States. The focus was on information-sharing, in which police planners and others contact other law enforcement agencies directly to gather the information they need to manage their departments. This study examined this informal network and its role in the dissemination of police research. The Police Communication Network Survey was mailed to the chief executives of 517 local departments and all 49 state police and highway patrol organizations in March 1996. The chief was asked to forward the questionnaire to the commander of the department's planning and research unit. Questions covered the agency most frequently contacted, how frequently this agency was contacted, mode of communication used most often, why this agency was contacted, and the agency most likely contacted on topics such as domestic violence, deadly force, gangs, community policing, problem-oriented policing, drug enforcement strategies, civil liability, labor relations, personnel administration, accreditation, and police traffic services. Information was also elicited on the number of times different law enforcement agencies contacted the respondent's agency in the past year, the percentage of time devoted to responding to requests for information from other agencies, and the amount of training the respondent and the staff received on the logic of social research, research design, statistics, operations research, cost-benefit analysis, evaluation research, and computing. Demographic variables include respondent's agency name, position, rank, number of years of police experience, number of years in the planning and research unit, and highest degree attained.

Curated

Community Policing in Madison, Wisconsin: Evaluation of Implementation and Impact, 1987-1990 (ICPSR 6480)

Released/updated on: 2005-11-04

Geographic coverage: Madison, United States, Wisconsin

Time period: 1987-01-01--1990-01-01

This study sought to evaluate the Madison, Wisconsin, Police Department's creation of a new organizational design (both structural and managerial) that was intended to support community-oriented and problem-oriented policing. One-sixth of the organization serving approximately one-sixth of the community was used as a test site for the new community policing approach. This Experimental Police District (EPD) was charged with implementing "quality policing," which emphasized quality of service delivery, quality of life in the community, and quality of life in the workplace. For the first part of the program evaluation, attitude changes among officers working in the EPD were compared with those of officers working in the rest of the police department. Part 1, Commissioned Personnel Data, Wave 1, contains responses from 269 commissioned personnel surveyed in December 1987, before the creation of the EPD. Part 2, Commissioned Personnel Data, Wave 2, consists of responses from 264 police officers who completed a Wave 2 survey in December 1988, and Part 3, Commissioned Personnel Data, Wave 3, supplies responses from 230 police officers who completed a Wave 3 survey in December 1989. Although the analysis was to be based on a panel design, efforts were made to survey all commissioned personnel during each survey administration period. Police personnel provided their assessments on how successfully quality leadership had been implemented, the extent to which they worked closely with and received feedback from other officers, the amount of their interaction with detectives, the amount of time available for problem-solving, ease of arranging schedules, safety of working conditions, satisfaction with working conditions, type of work they performed, their supervisor, commitment to the department, attitudes related to community policing and problem-solving, perception of their relationship with the community, views of human nature, attitudes toward change, attitudes toward decentralization, and demographic information. As the second part of the program evaluation, attitude changes among residents served by the EPD were compared with those of residents in the rest of the city. These data are presented in Part 4, Residents Data, Waves 1 and 2. Data for Wave 1 consist of personal interviews with a random sample of 1,166 Madison residents in February and March 1988, prior to the opening of the EPD station. During the second wave, Wave 1 respondents were interviewed by telephone in February and March 1990. Residents provided their perceptions of police presence, frequency and quality of police-citizen contacts, estimates of the magnitude of various problems in their neighborhoods, evaluation of the problem-solving efforts of the police, perception of neighborhood conditions, levels of fear of crime, personal experience of victimization, knowledge of victimization of other residents, and demographic information.

Curated

Comparison of Drug Control Strategies in San Diego, 1989 (ICPSR 9990)

Released/updated on: 2000-03-21

Geographic coverage: San Diego, United States, California

This study assesses the consequences for offenders of various drug enforcement strategies employed by the San Diego Police Department and profiles the factors that characterize street-level and mid-level dealers, drug users, and the drug market. The drug enforcement strategies examined include the use of search warrants, body wires, police decoys, surveillance, officer buys and sells, wiretaps, and sweeps. Measures of the consequences of arrests include drug and property seizures, convictions, and sentences. The data were drawn from police and court records of drug arrests made by three special sections of the police department in San Diego, California. Additionally, data were collected through personal interviews conducted at the time of arrest with a subsample of persons arrested for drug charges. The arrest tracking file, Part 1, contains demographic information about the offenders, including criminal history and gang membership, as well as data on each arrest through final disposition, charges, and sentencing. The interview portion of the study, Part 2, provides information about the demographics and characteristics of drug users and dealers, criminal history and drug use history, current arrest information, and offenders' opinions about drug use, drug sales, police strategies, and the drug market.

Curated

Partially restricted

Compstat and Organizational Change in the United States, 1999-2001 (ICPSR 25481)

Released/updated on: 2009-10-30

Geographic coverage: Minneapolis, United States, Lowell, Massachusetts, Minnesota, Newark, New Jersey

Time period: 1999-01-01--2001-01-01

The purpose of the study was to determine how Compstat programs were being implemented across the United States by examining the diffusion of Compstat and factors associated with its implementation. Another goal of the study was to assess the impact of Compstat on line or patrol officers at the bottom of the police organization. The researchers administered a national survey on Compstat and problem solving in police agencies (Part 1) by mail to all 515 American police agencies with over 100 sworn police officers, and to a random sample of 100 agencies with between 50 and 100 sworn officers. The researchers received a total of 530 completed surveys (Part 1) between June 1999 and April 2000. The researchers distributed an anonymous, voluntary, and self-administered survey (Part 2) between December 2000 and May 2001 to a total of 450 patrol officers at three police departments -- Lowell, Massachusetts (LPD), Minneapolis, Minnesota (MPD), and Newark, New Jersey (NPD). The Compstat Survey (Part 1) contains a total of 321 variables pertaining to executive views and departmental policy, organizational features and technology, and comments about problem solving in police agencies. The Line Officer Survey (Part 2) contains a total of 85 variables pertaining to the patrol officers' involvement in Compstat-generated activities, their motivation to participate in them, and their views on these activities.

Curated

Decision-Related Research on the Organization of Service Delivery Systems in Metropolitan Areas: Police Protection (ICPSR 7427)

Released/updated on: 2006-03-30

Geographic coverage: United States

Time period: 1970-01-01--1975-01-01

This study represents one of four research projects on service delivery systems in metropolitan areas, covering fire protection (DECISION-RELATED RESEARCH ON THE ORGANIZATION OF SERVICE DELIVERY SYSTEMS IN METROPOLITAN AREAS: FIRE PROTECTION [ICPSR 7409]), public health (DECISION-RELATED RESEARCH ON THE ORGANIZATION OF SERVICE DELIVERY SYSTEMS IN METROPOLITAN AREAS: PUBLIC HEALTH [ICPSR 7374]), solid waste management (DECISION-RELATED RESEARCH ON THE ORGANIZATION OF SERVICE DELIVERY SYSTEMS IN METROPOLITAN AREAS: SOLID WASTE MANAGEMENT [ICPSR 7487]), and police protection (the present study). All four projects used a common unit of analysis, namely all 200 Standard Metropolitan Statistical Areas (SMSAs) that, according to the 1970 Census, had a population of less than 1,500,000 and were entirely located within a single state. In each project, a limited amount of information was collected for all 200 SMSAs. More extensive data were gathered within independently drawn samples of these SMSAs, for all local geographical units and each administrative jurisdiction or agency in the service delivery areas. Two standardized systems of geocoding -- the Federal Information Processing Standard (FIPS) codes and the Office of Revenue Sharing (ORS) codes -- were used, so that data from various sources could be combined. The use of these two coding schemes also allows users to combine data from two or more of the research projects conducted in conjunction with the present one, or to add data from a wide variety of public data files. The present study used five major clusters of variables to investigate the delivery of police services: service conditions, the legal structure, organizational arrangements, manpower levels, and expenditure levels. Information about specific services such as patrol, traffic control, criminal investigation, radio communications, adult pre-trial detention, entry-level training, and crime laboratory analysis was collected at the local jurisdiction level in a random sample of 80 SMSAs. Part 1 summarizes in matrix form the relationships between all consumers and producers for each type of service in a given SMSA. Part 2 provides data about 1,885 consuming units, or service areas, defined as mutually exclusive geographical divisions of each SMSA that received police services. Part 3 contains information for 1,761 police agencies, defined as service producers, with functions and duties that may overlap several jurisdictions.

Curated

Developing a Comprehensive Empirical Model of Policing in the United States, 1996-1999 (ICPSR 4338)

Released/updated on: 2006-09-06

Geographic coverage: United States

Time period: 1996-01-01--2000-01-01

The aim of this study was to provide a systematic empirical assessment of three basic organizational premises of Community-Oriented Policing (COP). This study constructed a comprehensive data set by synthesizing data available in separate national data sets on police agencies and communities. The base data source used was the 1999 Law Enforcement Management and Administrative Statistics (LEMAS) survey [LAW ENFORCEMENT MANAGEMENT AND ADMINISTRATIVE STATISTICS (LEMAS), 1999 (ICPSR 3079)], which contained data on police organizational characteristics and on adoption of community-oriented policing procedures. The 1999 survey was supplemented with additional organizational variables from the 1997 LEMAS survey [LAW ENFORCEMENT MANAGEMENT AND ADMINISTRATIVE STATISTICS (LEMAS), 1997 (ICPSR 2700)] and from the 1996 Directory of Law Enforcement Agencies [DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1996: [UNITED STATES] (ICPSR 2260)]. Data on community characteristics were extracted from the 1994 County and City Data Book, from the 1996 to 1999 Uniform Crime Reports [UNIFORM CRIME REPORTING PROGRAM DATA. [UNITED STATES]: OFFENSES KNOWN AND CLEARANCES BY ARREST (1996-1997: ICPSR 9028, 1998: ICPSR 2904, 1999: ICPSR 3158)], from the 1990 and 2000 Census Gazetteer files, and from Rural-Urban Community classifications. The merging of the separate data sources was accomplished by using the Law Enforcement Agency Identifiers Crosswalk file [LAW ENFORCEMENT AGENCY IDENTIFIERS CROSSWALK [UNITED STATES], 1996 (ICPSR 2876)]. In all, 23 data files from eight separate sources collected by four different governmental agencies were used to create the merged data set. The entire merging process resulted in a combined final sample of 3,005 local general jurisdiction policing agencies. Variables for this study provide information regarding police organizational structure include type of government, type of agency, and number and various types of employees. Several indices from the LEMAS surveys are also provided. Community-oriented policing variables are the percent of full-time sworn employees assigned to COP positions, if the agency had a COP plan, and several indices from the 1999 LEMAS survey. Community context variables include various Census population categories, rural-urban continuum (Beale) codes, urban influence codes, and total serious crime rate for different year ranges. Geographic variables include FIPS State, county, and place codes, and region.

Curated

Directory of Law Enforcement Agencies, 1986: [United States] (ICPSR 8696)

Released/updated on: 1992-02-16

Geographic coverage: United States

This dataset lists law enforcement agencies and contains variables regarding employment categories such as total full-time, part-time, sworn-in, and other employees. It also contains FIPS codes and populations.

Curated

Directory of Law Enforcement Agencies, 1992: [United States] (ICPSR 2266)

Released/updated on: 2005-11-04

Geographic coverage: United States

Curated

Directory of Law Enforcement Agencies, 1996: [United States] (ICPSR 2260)

Released/updated on: 1998-09-11

Geographic coverage: United States

To ensure an accurate sampling frame for its Law Enforcement Management and Administrative Statistics (LEMAS) survey, the Bureau of Justice Statistics periodically sponsors a census of the nation's state and local law enforcement agencies. This census, known as the Directory Survey, gathers data on 49 primary state law enforcement agencies and all sheriffs' departments, local police departments, and special police agencies (state or local) that are publicly funded and employ at least one sworn officer with general arrest powers. The 1996 Directory Survey collected data on the number of sworn and nonsworn personnel employed by each agency, including both full-time and part-time employees. Within the full-time sworn category, data were collected from all agencies on the number who were uniformed officers with regularly assigned duties that included responding to calls for service. For agencies with at least 10 full-time sworn officers, the number whose primary duties were related to investigations, court operations, or jail operations was also obtained. This data collection, compiled in June 1996, represents the third such census, with the first occurring in 1986 (DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1986: [UNITED STATES] [ICPSR 8696]) and the second in 1992 (DIRECTORY OF LAW ENFORCEMENT AGENCIES, 1992: [UNITED STATES] [ICPSR 2266]). Variables include personnel totals, type of government, type of agency, and whether the agency had the legal authority to hold a person beyond arraignment for 48 or more hours.

Curated

Effects of Community Policing on Tasks of Street-Level Police Officers in Ohio, 1981 and 1996 (ICPSR 2481)

Released/updated on: 2005-11-04

Geographic coverage: United States, Ohio

These data were collected to analyze the impact of community-oriented policing (COP) on job assignments of police officers in Ohio. The study compared the self-reported job tasks of police officers in 1981 to those in 1996 to determine if job tasks had changed over time, if they differed between officers in departments pursuing community policing, or if they differed between officers assigned as "community policing" officers and those having more traditional assignments. The 1981 Ohio Peace Officer Task Analysis Survey was conducted to measure police officer tasks. A total of 1,989 police officers from over 300 Ohio police agencies responded to that survey. Recognizing that community policing had not yet begun to enjoy popularity when the first sample of officers was questioned in 1981 and that the job of policing and the training needs of peace officers had changed over the past 15 years, the Ohio Office of Criminal Justice Services again conducted a task analysis survey of a sample of police officers throughout the state in 1996. The 1996 survey instrument included 23 items taken directly from the earlier survey. These 23 items are the only variables from the 1981 survey that are included in this dataset, and they form the basis of the study's comparisons. A total of 1,689 officers from 229 police departments responded to the 1996 survey. Additionally, while the 1996 Peace Officer Task Analysis survey was in the field, the local police agencies included in the survey sample were asked to complete a separate agency survey to determine if they had a community policing program. A total of 180 departments returned responses to this agency survey. Background questions for the 1981 and 1996 task analysis surveys included police officers' age, race, sex, and job satisfaction. Items concerning police officers' job tasks covered frequency of conducting field searches of arrested persons, handcuffing suspects, impounding property, participating in raids, patrolling on foot, giving street directions, mediating family disputes, and engaging in school visits. The 1996 agency questionnaire gathered data on whether the police department had a COP program or a mission statement that emphasized community involvement, whether the COP program had an actual implementation date and a full-time supervisor, whether the respondents were currently assigned as COP officers, and whether the department's COP officers had had supplemental training.

Curated

Effects of Foot Patrol Policing in Boston, 1977-1985 (ICPSR 9351)

Released/updated on: 2006-01-12

Geographic coverage: United States, Massachusetts, Boston

Time period: 1977-01-01--1985-07-01

This collection evaluates the impact of a new foot patrol plan, implemented by the Boston Police Department, on incidents of crime and neighborhood disturbances. Part 1 contains information on service calls by types of criminal offenses such as murder, rape, aggravated assault, simple assault, robbery, larceny, burglary, and auto theft. It also contains data on types of community disturbances such as noisy party, gang, or minor disturbance and response priority of the incidents. Response priorities are classified according to a four-level scale: Priority 1: emergency calls including crimes in progress, high risk or personal injury, and medical emergencies, Priority 2: calls of intermediate urgency, Priority 3: calls not requiring immediate response, Priority 4: calls of undetermined priority. Parts 2 and 3 include information about patrol time used in each of the three daily shifts during the pre- and post-intervention periods. Part 4 presents information similar to Parts 2 and 3 but the data span a longer period of time--approximately seven years.

Curated

Partially restricted

Evaluating the Crime Control and Cost-Benefit Effectiveness of License Plate Recognition (LPR) Technology in Patrol and Investigations, United States, 2014 (ICPSR 37049)

Released/updated on: 2018-08-02

Geographic coverage: United States

Time period: 2014-04-01--2014-08-01

These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.

This study, through a national survey and field studies in both patrols and investigations, examined the crime control and cost-effectiveness of the use of license plate readers (LPRs) within police agencies in the United States.

The collection contains 1 SPSS data file (Data-file-for-2013-IJ-CX-0017.sav (n=329; 94 variables)).

A demographic variable includes an agency's number of authorized full time personnel.

Curated

Partially restricted

Evaluation of a Coordinated Community Response to Domestic Violence in Alexandria, Virginia, 1990-1998 (ICPSR 2858)

Released/updated on: 2006-07-13

Geographic coverage: United States, Alexandria, Virginia

Time period: 1990-01-01--1998-01-01

This study was undertaken to evaluate Alexandria, Virginia's Domestic Violence Intervention Program (DVIP), which is a coordinated community response to domestic violence. Specifically, the goals of the study were (1) to determine the effectiveness of DVIP, (2) to compare victims' perceptions of program satisfaction and other program elements between the Alexandria Domestic Violence Intervention Program and domestic violence victim support services in Virginia Beach, Virginia, (3) to examine the factors related to abusers who repeatedly abuse their victims, and (4) to report the findings of attitudinal surveys of the Alexandria police department regarding the mandatory arrest policy. Data were collected from four sources. The first two sources of data were surveys conducted via telephone interviews with females living in either Alexandria, Virginia (Part 1), or Virginia Beach, Virginia (Part 2), who were victims of domestic violence assault incidents in which the police had been contacted. These surveys were designed to describe the services that the women had received, their satisfaction with those services, and their experience with subsequent abuse. For Part 3 (Alexandria Repeat Offender Data), administrative records from the Alexandria Criminal Justice Information System (CJIS) were examined in order to identify and examine the factors related to abusers who repeatedly abused their victims. The fourth source of data was a survey distributed to police officers in Alexandria (Part 4, Alexandria Police Officer Survey Data) and was developed to assess police officers' attitudes regarding the domestic violence arrest policy in Alexandria. In four rounds of interviews for Part 1 and three rounds of interviews for Part 2, victims answered questions regarding the location where the domestic violence incident occurred and if the police were involved, their perceptions of the helpfulness of the police, prosecutor, domestic violence programs, hotlines, and shelters, their relationship to the abuser, their living arrangements at the time of each interview, and whether a protective order was obtained. Also gathered was information on the types of abuse and injuries sustained by the victim, whether she sought medical care for the injuries, whether drugs or alcohol played a role in the incident(s), whether the victim had been physically abused or threatened, yelled at, had personal property destroyed, or was made to feel unsafe by the abuser, if any other programs or persons provided help to the victim and how helpful these additional services were, and whether a judge ordered services for the victim or abuser. After the initial interviews, in subsequent rounds victims were asked if they had had any contact with the abuser since the last interview, if they had experienced any major life changes, if their situation had improved or gotten worse and if so how, and what types of assistance or programs would have helped improve their situation. Demographic variables for Part 3 include offenders' race, sex, age at first criminal nondomestic violence charge, and age at first domestic violence charge. Other variables include charge number, type, initiator, disposition, and sentence of nondomestic violence charges, as well as the conditions of the sentences, imposed days, months, and years, effective days, months, and years, type of domestic violence case, victim's relationship to offender, victim's age, sex, and race, whether alcohol or drugs were involved, if children were present at the domestic violence incident, the assault method used by the offender, and the severity of the assault. For Part 4, police officers were asked whether they knew what a domestic violent incident was, whether arresting without a warrant was considered good policy, whether they were in favor of domestic violence policy as a police response, whether they thought domestic violence policy was an effective deterrent, whether officers should have discretion to arrest, and how much discretion was used to handle domestic violence calls. The number and percent of domestic violence arrests made in the previous year, percent of domestic violence calls that involved mutual combat, and the number of years each respondent worked with the Alexandria, Virginia, police department are included in the file. Demographic variables for Part 4 include the age and gender of each respondent.

Curated

Extended National Assessment Survey of Law Enforcement Anti-Gang Information Resources, 1993-1994 (ICPSR 6565)

Released/updated on: 2005-11-04

Geographic coverage: United States

Time period: 1993-01-01--1994-01-01

This survey extended a 1992 survey (NATIONAL ASSESSMENT SURVEY OF LAW ENFORCEMENT ANTI-GANG INFORMATION RESOURCES, 1990-1992 [ICPSR 6237]) in two ways: (1) by updating the information on the 122 municipalities included in the 1992 survey, and (2) by including data on all cities in the United States ranging in population from 150,000 to 200,000 and including a random sample of 284 municipalities ranging in population from 25,000 to 150,000. Gang crime problems were defined in the same manner as in the 1992 survey, i.e., a gang (1) was identified by the police as a "gang," (2) participated in criminal activity, and (3) involved youth in its membership. As in the 1992 survey, a letter was sent to the senior law enforcement departmental administrator of each agency describing the nature of the survey. For jurisdictions included in the 1992 survey, the letter listed the specific information that had been provided in the 1992 survey and identified the departmental representative who provided the 1992 data. The senior law enforcement administrator was asked to report whether a gang crime problem existed within the jurisdiction in 1994. If a problem was reported, the administrator was asked to identify a representative of the department to provide gang crime statistics and a representative who was most knowledgeable on anti-gang field operations. Annual statistics on gang-related crime were then solicited from the departmental statistical representative. Variables include city, state, ZIP code, and population category of the police department, and whether the department reported a gang problem in 1994. Data on the number of gangs, gang members, and gang-related incidents reported by the police department are also provided. If actual numbers were not provided by the police department, estimates of the number of gangs, gang members, and gang-related incidents were calculated by sampling category.

Curated

Gang Involvement in "Rock" Cocaine Trafficking in Los Angeles, 1984-1985 (ICPSR 9398)

Released/updated on: 2006-03-30

Geographic coverage: United States, Los Angeles, California

Time period: 1984-01-01--1985-01-01

The purpose of this data collection was to investigate the possible increase in gang involvement within cocaine and "rock" cocaine trafficking. Investigators also examined the relationships among gangs, cocaine trafficking, and increasing levels of violence. They attempted to determine the effects of increased gang involvement in cocaine distribution in terms of the location of an incident, the demographic profiles of suspects, and the level of firearm use. They also looked at issues such as whether the connection between gangs and cocaine trafficking yielded more drug-related violence, how the connection between gangs and cocaine trafficking affected police investigative processes such as intra-organizational communication and the use of special enforcement technologies, what kinds of working relationships were established between narcotics units and gang control units, and what the characteristics were of the rock trafficking and rock house technologies of the dealers. Part 1 (Sales Arrest Incident Data File) contains data for the cocaine sales arrest incidents. Part 2 (Single Incident Participant Data File) contains data for participants of the cocaine sales arrest incidents. Part 3 (Single Incident Participant Prior Arrest Data File) contains data for the prior arrests of the participants in the cocaine arrest incidents. Part 4 (Multiple Event Incident Data File) contains data for multiple event incidents. Part 5 (Multiple Event Arrest Incident Data File) contains data for arrest events in the multiple event incidents. Part 6 (Multiple Event Incident Participant Data File) contains data for the participants of the arrest events. Part 7 (Multiple Event Incident Prior Arrest Data File) contains data for the prior arrest history of the multiple event participants. Part 8 (Homicide Incident Data File) contains data for homicide incidents. Part 9 (Homicide Incident Suspect/Victim Data File) contains data for the suspects and victims of the homicide incidents. Major variables characterizing the various units of observation include evidence of gang involvement, presence of drugs, presence of a rock house, presence of firearms or other weapons, presence of violence, amount of cash taken as evidence, prior arrests, and law enforcement techniques.

Curated

Governmental Responses to Crime in the United States, 1948-1978 (ICPSR 8076)

Released/updated on: 1992-02-16

Geographic coverage: United States

Time period: 1948-01-01--1978-01-01

The Governmental Responses to Crime Project was initiated in October 1978 as a result of the rising crime rate in urban areas of the United States and the wide variety of programs seeking to contain it. The project investigated the way in which urban governments, citizens, newspapers and state governments responded to the growth and increasing complexity of crime during the period from 1948 to 1978. Pertinent variables in this data collection include the number of police officers in cities and police expenditures, changes in laws as crime changes, populations, employment rates, family incomes, percent of non-white population, media tracking of crime, city land area, kinds of crimes, crime rates, actual numbers of offenses, penalties given out for crimes committed (time in jail or prison and fines), focus on crimes within certain geographical areas (from within cities or outside the United States), editorial page content, level of prominence of newspaper articles on individual crimes, and the number of editorials relating to specific crimes.

Curated

Partially restricted

How Justice Systems Realign in California: The Policies and Systemic Effects of Prison Downsizing, 1978-2013 (ICPSR 34939)

Released/updated on: 2017-03-30

Geographic coverage: United States, California

Time period: 1978-01-01--2012-01-01, 2013-03-01--2013-07-01, 2012-01-01--2013-01-01

These data are part of NACJD's Fast Track Release and are distributed as they there received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except of the removal of direct identifiers. Users should refer to the accompany readme file for a brief description of the files available with this collections and consult the investigator(s) if further information is needed.

The California correctional system underwent a dramatic transformation under California's Public Safety Realignment Act (AB 109) in 2011, a law that shifted from the state to the counties the responsibility for monitoring, tracking, and incarcerating lower level offenders previously bound for state prison. Realignment, therefore, presents the opportunity to witness 58 natural experiments in the downsizing of prisons. Counties faced different types of offenders, implemented different programs in different community and jail environments, and adopted differing sanctioning policies. This study examines the California's Public Safety Realignment Act's effect on counties' criminal justice institutions, including the disparities that result in charging, sentencing, and resource decisions.

Curated

Restricted

Impact of Community Policing at the Street Level: An Observational Study in Richmond, Virginia, 1992 (ICPSR 2612)

Released/updated on: 2006-03-30

This study's purpose was twofold: to investigate the nature of police patrol work in a community policing context and to field-test data collection instruments designed for systematic social observation. The project, conducted in Richmond, Virginia, where its police department was in the third year of a five-year plan to implement community policing, was designed as a case study of one police department's experience with community policing, focusing on officers in the patrol division. A team of eight researchers conducted observations with the police officers in the spring and summer of 1992. A total of 120 officers were observed during 125 observation sessions. Observers accompanied officers throughout their regular work shifts, taking brief field notes on officers' activities and encounters with the public. All of an observed officer's time during the shift was accounted for by either encounters or activities. Within 15 hours of the completion of the ridealong, the observer prepared a detailed narrative account of events that occurred during the ridealong and coded key items associated with these events. The study generated five nested quantitative datasets that can be linked by common variables. Part 1, Ridealong Data, provides information pertinent to the 125 observation sessions or "rides." Part 2, Activity Data, focuses on 5,576 activities conducted by officers when not engaged in encounters. Data in Part 3, Encounter Data, describe 1,098 encounters with citizens during the ridealongs. An encounter was defined as a communication between officers and citizens that took over one minute, involved more than three verbal exchanges between an officer and a citizen, or involved significant physical contact between the officer and citizen. Part 4, Citizen Data, provides data relevant to each of the 1,630 citizens engaged by police in the encounters. Some encounters involved more than one citizen. Part 5, Arrest Data, was constructed by merging Parts 1, 3, and 4, and provides information on 451 encounters that occurred during the ridealongs in which the citizen was suspected of some criminal mischief. All identification variables in this collection were created by the researchers for this project. Variables from Part 1 include date, start time, end time, unit, and beat assignment of the observation session, and the primary officer's and secondary officer's sex, race/ethnicity, years as an officer, months assigned to precinct and beat, hours of community policing training, and general orientation to community policing. Variables in Part 2 specify the time the activity began and ended, who initiated the activity, type, location, and visibility of the activity, involvement of the officer's supervisor during the activity, and if the activity involved problem-solving, or meeting with citizens or other community organizations. Part 3 variables include time encounter began and ended, who initiated the encounter, primary and secondary officer's energy level and mood before the encounter, problem as radioed by dispatcher, and problem as it appeared at the beginning of the encounter and at the end of the encounter. Information on the location of the encounter includes percent of time at initial location, visibility, officer's prior knowledge of the initial location, and if the officer anticipated violence at the scene. Additional variables focus on the presence of a supervisor, other police officers, service personnel, bystanders, and participants, if the officer filed or intended to file a report, if the officer engaged in problem-solving, and factors that influenced the officer's actions. Citizen information in Part 4 includes sex, age, and race/ethnicity of the citizen, role in the encounter, if the citizen appeared to be of low income, under the use of alcohol or drugs, or appeared to have a mental disorder or physical injury or illness, if the citizen was representing an establishment, if the citizen lived, worked, or owned property in the police beat, and if the citizen had a weapon. Also presented are various aspects of the police-citizen interaction, such as evidence considered by the officer, requests and responses to each other, and changes in actions during the encounter. Variables in Part 5 record the officer's orientation toward community policing, if the suspect was arrested or cited, if the offense was serious or drug-related, amount of evidence, if the victim requested that the suspect be arrested, if the victim was white, Black, and of low income, and if the suspect represented an organization. Information on the suspect includes gender, race, sobriety level, if of low income, if 19 years old or less, if actively resistant, if the officer knew the suspect adversarially, and if the suspect demonstrated conflict with others. Some items were recoded for the particular analyses for which the Arrest Data were constructed.

Curated

Partially restricted

Improving the Investigation, Clearance Rates, and Victim Restoration of Robberies: A Randomized Controlled Experiment, Seattle, Washington, Rochester, New York, 2021-2023 (ICPSR 39101)

Released/updated on: 2024-07-30

Geographic coverage: Seattle, United States, Rochester (New York), New York (state), Washington

Time period: 2021-01-01--2023-01-01

Clearance rates for most crimes have remained low and stable for decades (Braga et al., 2011), despite advances in police technologies (Koper et al., 2015). Many police agencies have developed triaging practices for criminal investigations using solvability factors to guess which cases are most likely to be solved and to allocate investigative resources to those crimes (Eck, 1983; 1992). This practice partially stems from a persistent belief that resolving crimes and the resulting clearance rates are due to circumstances of the crime and community context, and are beyond the control of police. However, a growing body of research has challenged this belief, demonstrating that enhanced investigative efforts can improve crime clearance rates beyond solvability factors (Braga and Dusseault, 2018; Lum and Wellford, 2023).

In this study, the research team sought to determine if investigative follow-ups could increase clearance rates for robbery and burglary cases (frequently occurring crime types with traditionally low clearance rates) and increase victim satisfaction with police services. Agencies selected for the study were the Seattle Police Department (SPD) in Seattle, Washington, and the Rochester Police Department (RPD) in Rochester, New York. Both agencies triaged a large proportion of robbery cases and would have a large enough sample size to successfully carry out an experiment.

The original study design was a randomized controlled trial. In both sites, robbery cases would be allocated to either the intervention condition--an investigative follow-up conducted by an officer during their daily patrol assignment--or the control condition with no follow-up. Challenges to personnel and agency funding from the COVID-19 pandemic, the murder of George Floyd, and other officer-involved deaths in 2020 led to difficulties implementing the study as initially designed. The experiment was not initiated in Rochester, and initiated but not completed in Seattle. Therefore, the team transitioned to a natural quasi-experiment design in Rochester and added a case analysis of robberies in Seattle.

This collection contains three datasets: victim satisfaction surveys from Seattle (DS1, n=39) and Rochester (DS2, n=37), and supplemental reports on follow-ups made during the Seattle experiment implementation (DS3, n=82).

Curated

Improving the Investigation of Homicide and the Apprehension Rate of Murderers in Washington State, 1981-1986 (ICPSR 6134)

Released/updated on: 2006-01-12

Geographic coverage: United States, Washington

Time period: 1981-01-01--1986-01-01

This data collection contains information on solved murders occurring in Washington State between 1981 and 1986. The collection is a subset of data from the Homicide Investigation Tracking System (HITS), a computerized database maintained by the state of Washington that contains information on murders and sexual assault cases in that state. The data for HITS are provided voluntarily by police and sheriffs' departments covering 273 jurisdictions, medical examiners' and coroners' offices in 39 counties, prosecuting attorneys' offices in 39 counties, the Washington State Department of Vital Statistics, and the Uniform Crime Report Unit of the Washington State Association of Sheriffs and Police Chiefs. Collected data include crime evidence, victimology, offender characteristics, geographic locations, weapons, and vehicles.

Curated

Increasing the Efficiency of Police Departments in Allegany County, New York, 1994-1995 (ICPSR 2558)

Released/updated on: 2006-03-30

Geographic coverage: United States, New York (state)

Time period: 1994-01-01--1995-01-01

This study sought to investigate the attitudes of residents and law enforcement personnel living or working in Allegany County, New York in order to (1) assess community support of law enforcement efforts to collaborate on projects, and (2) determine rural law enforcement agencies' willingness to work together on community policing projects and share resources in such a way as to improve and increase their overall individual and collective effectiveness and efficiency. Community policing, for this study, was defined as any law enforcement strategy designed to improve policy directed toward law enforcement interaction with community groups and citizens. Data were gathered from surveys that were distributed to two groups. First, to determine community perceptions of crime and attitudes toward the development of collaborative community policing strategies, surveys were distributed to the residents of the villages of Alfred and Wellsville and the town of Alfred in Allegany County, New York (Part 1, Community Survey Data). Second, to capture the ideas and perceptions of different types of law enforcement agencies regarding their willingness to share training, communication, and technology, surveys were distributed to the law enforcement agencies of Wellsville, Alfred, the New York State Police substation (located in the town of Wellsville), the county sheriff's department, and the Alfred State College and Alfred University public safety departments (Part 2, Law Enforcement Survey Data). For Part 1 (Community Survey Data), the residents were asked to rate their level of fear of crime, the reason for most crime problems (i.e., gangs, drugs, or unsupervised children), positive and negative contact with police, the presence and overall level of police service in the neighborhoods, and the importance of motor vehicle patrols, foot patrols, crime prevention programs, and traffic enforcement. Respondents were also asked whether they agreed that police should concentrate more on catching criminals (as opposed to implementing community-based programs), and if community policing was a good idea. Demographic data on residents includes their age, sex, whether they had been the victim of a property or personal crime, and the number of years they had lived in their respective communities. Demographic information for Part 2 (Law Enforcement Survey Data) includes the sex, age, and educational level of law enforcement respondents, as well as the number of years they had worked with their respective departments. Respondents were asked if they believed in and would support programs targeted toward youth, adults, the elderly, and merchants. Further queries focused on the number of regular and overtime hours used to train, develop, and implement department programs. A series of questions dealing with degrees of trust between the departments and levels of optimism was also asked to gauge attitudes that might discourage collaboration efforts with other departments on community-oriented programs. Officers were also asked to rate their willingness to work with the other agencies.

Curated

Partially restricted

Integrating Data to Reduce Violence, Milwaukee, WI, 2015-2016 (ICPSR 36591)

Released/updated on: 2018-03-16

Geographic coverage: Milwaukee, United States, Wisconsin

Time period: 2015-01-01--2016-07-01

The study investigated the feasibility of implementing the Cardiff Model. The Cardiff Model is a unique violence surveillance system and intervention that involves data sharing and violence prevention planning between law enforcement and the medical field. Anonymized data on assaults from emergency and police departments (EDs; PDs) are combined to detail assault incidents and "hotspots." Data are discussed by a multidisciplinary consortium, which develops and implements a data-informed violence prevention action plan that includes behavioral, environmental, and policy changes to impact violence. Model actions led to decreases in injurious assaults and this model is now statutory in the United Kingdom.

The Cardiff Model has never been translated to the U.S. and would require an investigation within our health care system and in different geographical and population contexts. This study investigated the feasibility of essential Cardiff Model Components in order to refine study procedures and situate this community to request further funds for full model implementation.

As part of this study, researchers collected a number of feasibility measures from ED and study staff to evaluate the feasibility of translating included model components. Geospatial and statistical analyses investigated the added benefit of the combined ED, PD and Emergency Medical Services (EMS) data.

The study contains 1 SPSS data files (CHW Data_1.1.15 to 7.31.16.sav (n=748; 14 variables)), 1 STATA data file (nurse survey data.dta (n=43; 26 variables)), a text document (Nurse Survey_Qualitative data.txt), and 1 excel file (CHW Incidents_Block level data only.xlsx).

Curated

Partially restricted

LAPD's TEAMS II: The Impact of a Police Integrity Early Intervention System, Los Angeles, California, 2000-2015 (ICPSR 36574)

Released/updated on: 2018-09-17

Geographic coverage: United States, Los Angeles, California

Time period: 2000-01-01--2015-01-01

This research was an evaluation of the Los Angeles Police Department's (LAPD) Training Evaluation and Management System II (TEAMS II) Early Intervention System conducted by Justice and Security Strategies, Inc. TEAMS II was designed to identify officers at-risk for engaging in future problematic behavior. This system was mandated as part of the Consent Decree (Section II) that was formally entered into on June 15, 2001 between the U.S. Department of Justice and the LAPD. Justice and Security Strategies, Inc. research staff worked with the Information Technology Bureau to obtain and analyze TEAMS II data, conducted informal interviews with officers, sergeants, civilians, command staff, and technologists involved with TEAMS II, and worked with the TEAMS II contractors to examine and provide recommendations.

The data collection includes 3 Stata data files. The concentration analysis dataset (TEAMS-Concentration-Analysis-FINAL-v2.dta) with 143 variables for 15,710 cases, the regression-discontinuity dataset (TEAMS-Regression-Discontinuity-FINAL.dta) with 98 variables for 297,779 cases, and the time series dataset (TEAMS-Time-Series-FINAL.dta) with 43 variables for 192 cases. Demographic variables included as part of this data collection include officer age, gender, ethnicity, education level, and total number of officers employed by demographics.

Curated

Simple Crosstabs

Law Enforcement Agency Roster (LEAR), 2016 (ICPSR 36697)

Released/updated on: 2017-04-05

Geographic coverage: United States

Time period: 2015-01-01--2016-01-01

In the past several years, BJS has made efforts to develop a national roster of publicly funded law enforcement agencies. The Census of State and Local Law Enforcement Agencies (CSLLEA) represents the core of the BJS's law enforcement statistics program, and is currently used as the primary universe for all BJS law enforcement collections. The CSLLEA was last conducted in 2014 but encountered data collection issues. Since the last law enforcement universe list was the 2008 CSLLEA, BJS decided further work was needed to have a reliable and complete roster of law enforcement agencies. Using the 2008 and 2014 CSLLEA universe as the base, the LEAR integrated multiple datasets in an effort to compile a complete list of active general purpose law enforcement agencies. The goal of the LEAR was to serve as the universe list for which the Law Enforcement Management and Administrative Statistics (LEMAS) core and supplement samples could be pulled. The 2016 LEAR contains a census of 15,810 general purpose law enforcement agencies, including 12,695 local and county police departments, 3,066 sheriffs' offices and 49 primary state police departments. Staffing size from multiple datasets has also been merged into the LEAR file.

Curated

Partially restricted

Law Enforcement and Sex Offender Registration and Notification: Perspectives, Uses, and Experiences, 2014-2015 [United States] (ICPSR 36534)

Released/updated on: 2017-12-19

Geographic coverage: United States

Time period: 2014-02-01--2014-06-01, 2015-04-01--2015-05-01

This study represents the first comprehensive national assessment of law enforcement uses of and perspectives on sex offender registration and notification (SORN) systems. The two-year, mixed-method study featured collection and analysis of interview data from over two-dozen jurisdictions, and administration of a nationwide survey of law enforcement professionals. The study examined ways in which law enforcement leaders, uniformed staff, and civilian staff engaged in SORN-related duties perceive SORN's roles and functions, general effectiveness, and informational utility. Additionally, the study elicited law enforcement perspectives related to promising SORN and related sex offender management practices, perceived barriers and challenges to effectiveness, and policy reform priorities.

This collection includes two SPSS data files and one SPSS syntax file: "LE Qualitative Data.sav" with 55 variables and 101 cases, "LE Quantitative Data-ICPSR.sav" with 201 variables and 1402 cases and "LE Quantitative Data Syntax.sps".

Qualitative data from interviews conducted with law enorcement professionals are not available at this time.

Curated

Simple Crosstabs

Law Enforcement Management and Administrative Statistics Body-Worn Camera Supplement (LEMAS-BWCS), 2016 (ICPSR 37302)

Released/updated on: 2019-06-20

Geographic coverage: United States

Time period: 2015-01-01--2016-01-01

Beginning in 2016, the Law Enforcement Management and Administrative Statistics (LEMAS) survey adopted a core and supplement structure. The LEMAS core has been conducted every 3 to 4 years since 1987 with approximately 3,200 local, county and state law enforcement agencies across the United States. Due to the breadth of the survey, detailed analysis of any specific law enforcement topic cannot be done with the LEMAS core. The LEMAS supplements are designed to fill this void by allowing for a more comprehensive examination on a key topic in law enforcement and are administered in between core years. The 2016 LEMAS Body-Worn Camera Supplement (LEMAS-BWCS) is the first supplement administered under the new structure.

Curated

Law Enforcement Management and Administrative Statistics (LEMAS), 1987 (ICPSR 9222)

Released/updated on: 2012-08-01

Geographic coverage: United States

Time period: 1987-06-01--1988-06-01

This survey, the first in the Bureau of Justice Statistics' program on Law Enforcement Management and Administrative Statistics (LEMAS), presents information on three types of general purpose law enforcement agencies: state police, local police, and sheriffs' departments. Data from the primary state police agency in each of 49 states (Hawaii does not have a state police agency) are also presented. Variables include size of the populations served by the typical police or sheriffs' department, levels of employment and spending, various functions of the department, average salary levels for uniformed officers, and other matters relating to management and personnel.

Curated

Law Enforcement Management and Administrative Statistics (LEMAS), 1990 (ICPSR 9749)

Released/updated on: 2012-08-02

Geographic coverage: United States

This survey, the second in the Bureau of Justice Statistics' program on Law Enforcement and Administrative Statistics (LEMAS), presents information on four types of general-purpose law enforcement agencies: state police, local police, special police, and sheriff's departments. Variables include size of the population served by the police or sheriff's department, levels of employment and spending, various functions of the department, average salary levels for uniformed officers, and other matters related to management and personnel.

Curated

Law Enforcement Management and Administrative Statistics (LEMAS), 1993 (ICPSR 6708)

Released/updated on: 2012-08-02

Geographic coverage: United States

This survey, the third in the Bureau of Justice Statistics' program on Law Enforcement and Administrative Statistics (LEMAS), presents information on five types of general-purpose law enforcement agencies: state police, county police, special police (state and local), municipal police, and sheriff's departments. Variables include size of the population served by the police or sheriff's department, levels of employment and spending, various functions of the department, average salary levels for uniformed officers, policies and programs, and other matters related to management and personnel.

Curated

Law Enforcement Management and Administrative Statistics (LEMAS): 1997 Sample Survey of Law Enforcement Agencies (ICPSR 2700)

Released/updated on: 2008-12-04

Geographic coverage: United States

This survey, the fourth in the Bureau of Justice Statistics' program on Law Enforcement and Administrative Statistics (LEMAS), presents information on law enforcement agencies: state police, county police, special police (state and local), municipal police, and sheriff's departments. Variables include size of the population served by the police or sheriff's department, levels of employment and spending, various functions of the department, average salary levels for uniformed officers, policies and programs, and other matters related to management and personnel.

Curated

Law Enforcement Management and Administrative Statistics (LEMAS): 1999 Sample Survey of Law Enforcement Agencies (ICPSR 3079)

Released/updated on: 2008-12-09

Geographic coverage: United States

This survey, the fourth in the Bureau of Justice Statistics' program on Law Enforcement Management and Administrative Statistics (LEMAS), presents information on law enforcement agencies: state police, county police, special police (state and local), municipal police, and sheriff's departments. Variables include size of the population served by the police or sheriff's department, levels of employment and spending, various functions of the department, average salary levels for uniformed officers, policies and programs, and other matters related to management and personnel.

Curated

Law Enforcement Management and Administrative Statistics (LEMAS): 2000 Sample Survey of Law Enforcement Agencies (ICPSR 3565)

Released/updated on: 2008-12-08

Geographic coverage: United States

This survey, the sixth in the Bureau of Justice Statistics' program on Law Enforcement and Administrative Statistics (LEMAS), presents information on law enforcement agencies in the United States: state police, county police, special police (state and local), municipal police, and sheriff's departments. Variables include size of the population served by the police or sheriff's department, levels of employment and spending, various functions of the department, average salary levels for uniformed officers, policies and programs, and other matters related to management and personnel.This survey, the sixth in the Bureau of Justice Statistics' program on Law Enforcement and Administrative Statistics (LEMAS), presents information on law enforcement agencies in the United States: state police, county police, special police (state and local), municipal police, and sheriff's departments. Variables include size of the population served by the police or sheriff's department, levels of employment and spending, various functions of the department, average salary levels for uniformed officers, policies and programs, and other matters related to management and personnel.

Curated

Law Enforcement Management and Administrative Statistics (LEMAS): 2003 Sample Survey of Law Enforcement Agencies (ICPSR 4411)

Released/updated on: 2006-05-10

Geographic coverage: United States

The Law Enforcement Management and Administrative Statistics (LEMAS) survey collects data from a nationally representative sample of publicly funded State and local law enforcement agencies in the United States. Data include agency personnel, expenditures and pay, operations, community policing initiatives, equipment, computers and information systems, and written policies. The LEMAS survey has been conducted in 1987, 1990, 1993, 1997, 1999 (limited scope), 2000, and 2003.