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This study evaluated the effects of demolishing or rehabilitating vacant and decaying buildings in Cleveland, Ohio and Detroit, Michigan as a violence prevention measure. Researchers used detailed longitudinal property-level data from 2011-2017 in Cleveland, Ohio and 2017 in Detroit, Michigan, to estimate the effects of demolition and rehabilitation of vacant and decaying properties under different targeting strategies and concentrations. The data produced by this study were aggregated into neighborhood-level variables of varying geographic specificity, which measure the study's primary outcome, firearm violence, and primary exposures, property demolition and rehabilitation. These data also include contextual variables reporting socioeconomic data, demographics, additional violent and nonviolent crime rates, and neighborhood composition variables (e.g. counts of commercial lots, apartments, single family homes/condominiums, etc.) at the neighborhood-level.

The focus of this research study was to determine if the data and 3D images of bullet and cartridge cases acquired from different 3D imaging instruments are interchangeable between systems. The firearm that fired each bullet and cartridge case is known and scans were obtained with a variety of instruments. The gun, caliber, and type of ammunition were controlled.

This study examined the effects of public art installations on firearm violence and youth firearm victimization in Detroit. The study also examined the potential moderating effects of the level of community engagement in the development of public artworks on the relationship between public artworks and firearm violence in Detroit. The researchers hypothesized that installations of public artworks would have protective effects for firearm incidents and youth-involved firearm incidents, as measured by completely de-identified crime data provided to their research team by the Michigan State Police (data set not publicly available).

Through this study, the researchers also collected survey and interview data from adults to understand the costs of public artworks and the level of community engagement in the development of public artworks. The researchers hypothesized that higher levels of community engagement in the development of public artworks would enhance the protective effects of public art on firearm violence and youth firearm violence victimization because it would foster protective social resources in communities, such as social capital and social control, that are critical for reducing crime and violence. The researchers also conducted preliminary cost-effectiveness and cost-benefit analyses to inform practitioners and policymakers about the feasibility of expanding programming for community-engaged art installations.

The Specific Aims of This Study Are As Follows:

• Aim 1: Examine the effect of art installation projects on total firearm crime incidents involving youth under 18.
• Aim 2: Examine how the level of community engagement in the art installation projects may enhance the effects on firearm crime incidents.
• Aim 3: Conduct a cost-effectiveness analysis of different types of public art and firearm incidents prevented.

These data were collected using the National Electronic Injury Surveillance System (NEISS), the primary data system of the United States Consumer Product Safety Commission (CPSC). CPSC began operating NEISS in 1972 to monitor product-related injuries treated in United States hospital emergency departments (EDs). In June 1992, the National Center for Injury Prevention and Control (NCIPC), within the Centers for Disease Control and Prevention, established an interagency agreement with CPSC to begin collecting data on nonfatal firearm-related injuries in order to monitor the incidents and the characteristics of persons with nonfatal firearm-related injuries treated in United States hospital EDs over time. This dataset represents all nonfatal firearm-related injuries (i.e., injuries associated with powder-charged guns) and all nonfatal BB and pellet gun-related injuries reported through NEISS from 2023. The cases consist of initial ED visits for treatment of the injuries.

The NEISS-FISS is designed to provide national incidence estimates of nonfatal firearm injuries treated in U.S. hospital EDs. Data on injury-related visits are obtained from a national sample of NEISS hospitals, which were selected as a stratified probability sample of hospitals in the United States and its territories with a minimum of six beds and a 24- hour ED. The sample includes separate strata for very large, large, medium, and small hospitals, defined by the number of annual ED visits per hospital, and children's hospitals. The scope of reporting goes beyond routine reporting of injuries associated with consumer- related products in CPSC's jurisdiction to include all firearm injuries. The data can be used to (1) measure the magnitude and distribution of nonfatal firearm injuries in the United States; (2) monitor unintentional and violence-related nonfatal firearm injuries over time; (3) identify emerging injury problems; (4) identify specific cases for follow-up investigations of particular injury-related problems; and (5) set national priorities. A fundamental principle of this expansion effort is that preliminary surveillance data will be made available in a timely manner to a number of different federal agencies with unique and overlapping public health responsibilities and concerns. The final edited data will be released annually as public use data files for use by other public health professionals and researchers.

These public use data files provide NEISS-FISS data on nonfatal injuries collected from January through December each year.

NEISS-FISS is providing data on over 100,000 estimated cases annually. Data obtained on each case include age, race/ethnicity, sex, principal diagnosis, primary body part affected, consumer products involved, disposition at ED discharge (i.e., hospitalized, transferred, treated and released, observation, died), locale where the injury occurred, work-relatedness, and a narrative description of the injury circumstances. Also, intent of injury (e.g., unintentional, assault, self-harm, legal intervention) are being coded for each case in a manner consistent with the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) coding rules and guidelines.

Users are cautioned against using estimates with wide confidence intervals to make conclusions about point estimates. Firearm injuries have distinct geographic patterns and estimates can be imprecise or change over time when based on a small number of facilities.

NEISS has been managed and operated by the U.S. Consumer Product Safety Commission since 1972 and is used by the Commission for identifying and monitoring consumer product-related injuries and for assessing risk to all U.S. residents. These product- related injury data are used for educating consumers about hazardous products and for identifying injury-related cases used in detailed studies of specific products and associated hazard patterns. These studies set the stage for developing both voluntary and mandatory safety standards.

Since the early 1980s, CPSC has assisted other federal agencies by using NEISS to collect injury- related data of special interest to them. In 1992, an interagency agreement was established between NCIPC and CPSC to (1) collect NEISS data on nonfatal firearm- related injuries for the CDC Firearm Injury Surveillance Study; (2) publish NEISS data on a variety of injury-related topics, such as in- line skating, firearms, BB and pellet guns, bicycles, boat propellers, personal water craft, and playground injuries; and (3) to address common concerns. CPSC also uses NEISS to collect data on work-related injuries for the National Institute of Occupational Safety and Health (NIOSH), CDC.

In July 2000, NCIPC, in collaboration with CPSC, expanded NEISS to collect data on all types and causes of injuries treated in a representative sample of hospitals. This system is called the "NEISS All-Injury Program (NEISS-AIP)". These data provide the basis for national estimates of all types of nonfatal injuries treated in hospital emergency departments in the United States.

Beginning in 2019, CPSC initiated a redesign of the NEISS sample to update the sampling frame. The redesign includes adding and replacing hospitals. The redesign includes a resample based on more recent hospital information from the American Hospital Association, including the list of hospitals by hospital type. The prior sample was drawn in 1997. The NEISS sample goal is 100 hospitals; hospital recruitment and onboarding are ongoing. CDC and CPSC are continuing to release injury data while the onboarding is underway.

Although there has been much national discussion, both in scientific literature and popular press, and a growing scientific literature about firearm deaths, much less attention has been paid to non-fatal firearm injury that constitutes 70 percent of the victims of firearm violence. While rates of national fatal firearm mortality rates have stayed more or less stable in the U.S. since the turn of the twenty-first century, the rates of non-fatal firearm injury have, however, increased, driving the epidemic of firearm violence. Rates of non-fatal firearm injuries are inconsistent across the country, with substantial spatial heterogeneity changing over time.

The goal of this project was to understand the drivers of non-fatal firearm injury in order to guide efforts that may reduce related injuries. This study included four aims of analysis:

1. Document the state-specific (spatial) differences and the changes across time (temporal) of non-fatal firearm injury among all, by racial-ethnic groups and intents of injury.
2. Assess the state-level factors that influence these changes such as state-specific firearm laws and social characteristics (e.g., minority proportion, rates of unemployment, income inequality, suicide, divorce, firearm ownership, alcohol consumption, drug use, and non-firearm homicide).
3. Determine the individual socio-demographic and clinical factors that drive both spatial and time trends.
4. Determine if individual factors modify the spatio-temporal patterns of non-fatal firearm injury, and whether this explains racial-ethnic and intent differences.

The resulting datasets are at state-level analysis.

In 2015, the Bureau of Justice Assistance's (BJA) selected the team of National Shooting Sports Foundation (NSSF) and APCO Worldwide to distribute firearm locks and conduct safety education activities under its Firearm Locks Distribution and Safe Storage Program (FLD/SSP). The National Institute of Justice funded the RAND Corporation to conduct an process and implementation evaluation of the FLD/SSP. NSSF titled their effort Project ChildSafe (PCS) Communities, a community-focused effort that was developed using the framework of their national Project ChildSafe initiative. The main research objectives were to monitor and document the PCS Communities program's design; assess areas of success and strengths in the implementation process, including the effectiveness of partnerships; identify challenges to implementation of the program with fidelity to the planned design.

These data were collected using the National Electronic Injury Surveillance System (NEISS), the primary data system of the United States Consumer Product Safety Commission (CPSC). CPSC began operating NEISS in 1972 to monitor product-related injuries treated in United States hospital emergency departments (EDs). In June 1992, the National Center for Injury Prevention and Control (NCIPC), within the Centers for Disease Control and Prevention, established an interagency agreement with CPSC to begin collecting data on nonfatal firearm-related injuries in order to monitor the incidents and the characteristics of persons with nonfatal firearm-related injuries treated in United States hospital EDs over time. This dataset represents all nonfatal firearm-related injuries (i.e., injuries associated with powder-charged guns) and all nonfatal BB and pellet gun-related injuries reported through NEISS from YYYY. The cases consist of initial ED visits for treatment of the injuries.

The NEISS-FISS is designed to provide national incidence estimates of nonfatal firearm injuries treated in U.S. hospital EDs. Data on injury-related visits are obtained from a national sample of NEISS hospitals, which were selected as a stratified probability sample of hospitals in the United States and its territories with a minimum of six beds and a 24- hour ED. The sample includes separate strata for very large, large, medium, and small hospitals, defined by the number of annual ED visits per hospital, and children's hospitals. The scope of reporting goes beyond routine reporting of injuries associated with consumer- related products in CPSC's jurisdiction to include all firearm injuries. The data can be used to (1) measure the magnitude and distribution of nonfatal firearm injuries in the United States; (2) monitor unintentional and violence-related nonfatal firearm injuries over time; (3) identify emerging injury problems; (4) identify specific cases for follow-up investigations of particular injury-related problems; and (5) set national priorities. A fundamental principle of this expansion effort is that preliminary surveillance data will be made available in a timely manner to a number of different federal agencies with unique and overlapping public health responsibilities and concerns. The final edited data will be released annually as public use data files for use by other public health professionals and researchers.

These public use data files provide NEISS-FISS data on nonfatal injuries collected from January through December each year.

NEISS-FISS is providing data on over 100,000 estimated cases annually. Data obtained on each case include age, race/ethnicity, sex, principal diagnosis, primary body part affected, consumer products involved, disposition at ED discharge (i.e., hospitalized, transferred, treated and released, observation, died), locale where the injury occurred, work-relatedness, and a narrative description of the injury circumstances. Also, intent of injury (e.g., unintentional, assault, self-harm, legal intervention) are being coded for each case in a manner consistent with the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) coding rules and guidelines.

Users are cautioned against using estimates with wide confidence intervals to make conclusions about point estimates. Firearm injuries have distinct geographic patterns and estimates can be imprecise or change over time when based on a small number of facilities.

NEISS has been managed and operated by the U.S. Consumer Product Safety Commission since 1972 and is used by the Commission for identifying and monitoring consumer product-related injuries and for assessing risk to all U.S. residents. These product- related injury data are used for educating consumers about hazardous products and for identifying injury-related cases used in detailed studies of specific products and associated hazard patterns. These studies set the stage for developing both voluntary and mandatory safety standards.

Since the early 1980s, CPSC has assisted other federal agencies by using NEISS to collect injury- related data of special interest to them. In 1992, an interagency agreement was established between NCIPC and CPSC to (1) collect NEISS data on nonfatal firearm- related injuries for the CDC Firearm Injury Surveillance Study; (2) publish NEISS data on a variety of injury-related topics, such as in- line skating, firearms, BB and pellet guns, bicycles, boat propellers, personal water craft, and playground injuries; and (3) to address common concerns. CPSC also uses NEISS to collect data on work-related injuries for the National Institute of Occupational Safety and Health (NIOSH), CDC.

In July 2000, NCIPC, in collaboration with CPSC, expanded NEISS to collect data on all types and causes of injuries treated in a representative sample of hospitals. This system is called the "NEISS All-Injury Program (NEISS-AIP)". These data provide the basis for national estimates of all types of nonfatal injuries treated in hospital emergency departments in the United States.

Beginning in 2019, CPSC initiated a redesign of the NEISS sample to update the sampling frame. The redesign includes adding and replacing hospitals. The redesign includes a resample based on more recent hospital information from the American Hospital Association, including the list of hospitals by hospital type. The prior sample was drawn in 1997. The NEISS sample goal is 100 hospitals; hospital recruitment and onboarding are ongoing. CDC and CPSC are continuing to release injury data while the onboarding is underway.

The purpose of this study was to assess how patterns of prosecution and plea bargaining in firearms cases shape subsequent case and defendant outcomes. Drawing on recent work (Johnson and Larroulet, 2019), the researchers developed measures of plea bargaining discounts and examined their effects on sentencing and recidivism for firearms-involved offenders. To do so, the investigators [1] analyzed unique data collected by the Client Legal Utility Engine (CLUE), a web-scraped database of court records for all criminal cases in the State of Maryland for a cohort of defendants charged with firearms-involved crimes in district and circuit courts between 2015 and 2019; [2] generated estimates of the average distance traveled in charge bargaining, or the magnitude of average sentencing discounts in gun cases in Maryland by comparing expected sentences based on the original filed charges to the final charges at conviction; and [3] explored the association between plea discounts and recidivism, measured by the defendant coming back into the criminal court system on new criminal charges. The resulting dataset includes information on criminal case processing outcomes for firearms-related cases processed in Maryland district and circuit courts for the time period 2015-2019.

This study investigated root causes of school shootings by using a case-control methodology to compare 157 adolescent school shooters (cases) to samples of two key comparison groups: 157 non-school adolescent shooting offenders and 157 non-offending youths who attended the same school as the school shooter (controls) in the United States between 1990 and 2020 (overall n=471). Specifically, the researchers compared:

1. Adolescent school shooters who committed shootings both fatal and non-fatal to adolescents who committed shootings both fatal and non-fatal outside school grounds in the community.
2. Adolescent school shooters who committed homicide to adolescents who committed shooting homicides outside school grounds in the community.
3. Adolescent school shooters who caused non-fatal injuries to adolescents who committed non-fatal shootings with injuries outside school grounds in the community.
4. Adolescent school shooters to non-offending students from the same school.

All groups were compared on items theorized to be risk and protective factors to crime based on major criminology theories, such as social learning, general strain, social control, bio-social, life course, and psychology. Building upon the methodology used in The American School Shooting Study (TASSS), this study relied on open-source, content analysis research methods to obtain all publicly available information on the sampled individuals. Files were collected from over 60 databases, major search engines, and archival resources, which were then reviewed and coded by the research team for evidence of risk and protective factors.

This study contains data from the Northwestern Juvenile Project (NJP) Series, a prospective longitudinal study of the mental health needs and outcomes of youth in detention.

The purpose of this study was to examine nonfatal firearm injury and firearm mortality in 1,829 youths in Chicago, Illinois who were involved with the juvenile justice system and to compare incidence rates of firearm mortality with the general population.

The study publication is available for download.

Despite the enormous toll of gun violence in America, shockingly little is known about what works to reduce gun violence or the illegal gun markets that put guns in dangerous hands. Research suggests that a typical crime gun is likely to be involved in a series of transactions between its first legal purchase from a Federal Firearms Licensee (FFL) and its recovery by police. These intermediate exchanges are largely invisible to gun trace data systems and governmental regulatory bodies, and known only to those involved in or close to these underground gun markets. The hypothesis motivating this project is that substantial progress could be made in the near term in reducing gun involvement in violence through strategic law enforcement interventions against what are call underground gun markets - if only more was known about how such markets actually worked.

To that end, the goal of this project is to learn more about how underground markets supply guns to people at highest risk of using them in violent crimes, through a mixed-methods study in Chicago that collects and analyzes several unique new sources of qualitative and quantitative data.

In 2015, the National Institute of Justice funded the Urban Institute's Evaluation of Gunshot Detection Technology to Aid in the Reduction of Firearms Violence. This project was designed to investigate the degree to which gunshot detection technology (GDT) aids in the response, investigation, and prevention of firearms violence and related crimes. The goal of this study was to conduct a rigorous process and impact evaluation of GDT to inform policing researchers and practitioners about the impact GDT may have. To achieve this goal, the research team implemented a mixed-methods research design with police departments in Denver, Colorado; Milwaukee, Wisconsin; and Richmond, California.

Quantitative data collection included administrative data on calls for service (CFS), crime, and GDT alerts, as well as comprehensive case file reviews of 174 crimes involving a firearm. Quantitative analyses examined the impact of GDT by (1) comparing counts of gunshot notifications for GDT alerts to shooting-related CFS, (2) comparing response times of GDT alerts to shooting-related CFS, (3) examining the impact GDT has had on CFS and crimes, and (4) conducting a cost-benefit analysis of the GDT. Qualitative data collection included 46 interviews with criminal justice stakeholders to learn implementation processes and challenges associated with its GDT, and 6 focus groups with 49 community members to learn how residents feel about policing efforts to reduce firearm violence and its use of GDT.

Three types of files were uploaded for each site. They include quantitative data on crimes and CFS (DS1-DS3), gunshot notifications (DS4-DS6), and response times (DS7-DS9). The qualitative data are not currently available as part of this collection.

The data was used to provide estimates of the effects of a Los Angeles letter program on citywide levels of homicide, robbery, and aggravated assault with a firearm. This study will provide the city of Los Angeles and other jurisdictions in California (and beyond) with information on the impact and cost-effectiveness of an innovative gun letter program. This project involves the following:

• statistical analysis of gun-level data to assess program impact on reporting guns lost or stolen,
• statistical analysis to evaluate the impact of the program on city-level crimes involving a firearm, and
• assessment of program costs.

The National Lawful Use of Guns Survey is a baseline internet-based survey of 2,086 gun owners who were surveyed in 2019 and again one year later. The survey measured a wide range of variables, including: (a) psychographics; (b) firearm-related knowledge, beliefs, attitudes, practices, and norms; (c) a wide range of personal values; (d) level of engagement with guns (emotional and moral attachment to guns); (e) association between firearms and personal values; (f) mindset towards firearm and other public health policies; (g) level of inclusion in or alienation from the gun control movement; and (h) level of civic engagement with gun violence prevention.

The National Lawful Use of Guns Follow-Up Survey was conducted in 2020 and sampled the same 2,086 gun owners who responded to the baseline survey. This survey tested several communication messages intended to try to increase the willingness of gun owners to participate in gun violence prevention activities.

This study contains data from the Northwestern Juvenile Project (NJP) series, a prospective longitudinal study of the mental health needs and outcomes of youth in detention.

The research team interviewed participants from the Northwestern Juvenile Project (NJP) (originally enrolled as they entered the Cook County Juvenile Temporary Detention Center from 1995 to 1998, and now parents ages 34-43 years) and their oldest child age 10 to 17 years when sampled, and leveraged data already collected on parents' firearm involvement--during their own adolescence and young adulthood for the NJP.

The project focused specifically on strategies and approaches explicitly intended to reduce gun-related violence committed by young people between the ages of 10 and 25 who may also be associated with gangs/groups, including interventions that solely or primarily serve youth. The study team did not focus on all strategies designed to reduce youth violence, nor on gang prevention and intervention efforts not expressly intended to reduce gun violence and homicide. Based on this framing, the study team focused on interventions that are immediate responses to an acute problem, rather than those that address risk factors associated with violence broadly. This work drew on three main models of interventions: Spergel Model of Gang Intervention and Suppression ("Spergel")/Office of Juvenile Justice and Delinquency Prevention (OJJDP) Comprehensive Gang Model (CGM) intervention models, focused deterrence models, and public health models. Both the review of literature and scan of practice include some interventions that do not fit into any of these models.

The review of literature included identification and synthesis of research on the implementation and impact of relevant violence prevention, reduction, and control strategies. The literature review only included interventions that have published research about their efficacy. The scan of practice identified 14 interventions and conducted 13 virtual site visits including interviews and observations. Site selection was based on criteria and with input from a group of subject-matter experts, National Institute of Justice (NIJ), and OJJDP. The scan of practice was not a comprehensive scan and did not include a representative sample by type or location of intervention.

This project investigated the experiences of New York City youth ages 16-24 who were at high risk for gun violence (e.g., carried a gun, been shot or shot at). Youth participants were recruited from three neighborhoods with historically high rates of gun violence when compared to the city as a whole--Brownsville (Brooklyn), Morrisania (Bronx), and East Harlem (Manhattan). This study explores the complex confluence of individual, situational, and environmental factors that influence youth gun acquisition and use. This study is part of a broader effort to build an evidence-based foundation for individual and community interventions, and policies that will more effectively support these young people and prevent youth gun violence. Through interviews with 330 youth, this study seeks to answer these questions:

1. What are the reasons young people carry guns?
2. How do young people talk about having and using guns?
3. What are young people's social networks like, and what roles do guns play in thesenetworks?

Interviews covered the following topics: neighborhood perceptions; perceptions of and experiences with the police, gangs, guns, and violence; substance use; criminal history; and demographics: race, gender, age, legal status, relationship status, living situation, location, number of children, drug use, and education.

This study contains data from the Northwestern Juvenile Project (NJP) series, a prospective longitudinal study of the mental health needs and outcomes of youth in detention.

This study examined the following goals: (1) firearm involvement (access, ownership, and use) during adolescence and young adulthood; (2) perpetration of firearm violence over time; and (3) patterns of firearm victimization (injury and mortality) over time. This study addressed the association between early involvement with firearms and firearm-firearm perpetration and victimization in adulthood.

The original sample included 1,829 randomly selected youth, 1,172 males and 657 females, then 10 to 18 years old, enrolled in the study as they entered the Cook County Juvenile Temporary Detention Center from 1995 to 1998. Among the sample were 1,005 African Americans, 524 Hispanics, and 296 non-Hispanic white respondents. Participants were tracked from the time they left detention. Re-interviews were conducted regardless of where respondents were living when their follow-up interview was due: in the community, correctional settings, or by telephone if they lived farther than two hours from Chicago.

The State Firearm Database catalogs the presence or absence of 134 firearm safety laws in 14 categories covering the 26-year period from 1991 to 2019. The classification system categorizes state firearm provisions using a methodology that both captures differences and maintains a level of comparability between states. Because of this, the database is not the most detailed nor the most comprehensive record of all state firearm policies. Other resources may provide users with a deeper understanding of individual provisions, while this database serves as an efficient way to compare the broad scope of state firearm laws across the country. These provisions covered 14 aspects of state policies, including regulation of the process by which firearm transfers take place, ammunition, firearm possession, firearm storage, firearm trafficking, and liability of firearm manufacturers. In addition, descriptions of the criteria used to code each provision have been provided so that there is transparency in how various law exemptions, exceptions, and other nuances were addressed.