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This study evaluated CeaseFire, a program of the Chicago Project for Violence Prevention. The evaluation had both outcome and process components.

The outcome evaluation assessed the program's impact on shootings and killings in selected CeaseFire sites. Two types of crime data were compiled by the research team: Time Series Data (Dataset 1) and Shooting Incident Data (Dataset 2). Dataset 1 is comprised of aggregate month/year data on all shooting, gun murder, and persons shot incidents reported to Chicago police for CeaseFire's target beats and matched sets of comparison beats between January 1991 and December 2006, resulting in 1,332 observations. Dataset 2 consists of data on 4,828 shootings that were reported in CeaseFire's targeted police beats and in a matched set of comparison beats for two-year periods before and after the implementation of the program (February 1998 to April 2006).

The process evaluation involved assessing the program's operations and effectiveness. Researchers surveyed three groups of CeaseFire program stakeholders: employees, representatives of collaborating organizations, and clients.

The three sets of employee survey data examine such topics as their level of involvement with clients and CeaseFire activities, their assessments of their clients' problems, and their satisfaction with training and management practices. A total of 154 employees were surveyed: 23 outreach supervisors (Dataset 3), 78 outreach workers (Dataset 4), and 53 violence interrupters (Dataset 5).

The six sets of collaborating organization representatives data examine such topics as their level of familiarity and contact with the CeaseFire program, their opinions of CeaseFire clients, and their assessments of the costs and benefits of being involved with CeaseFire. A total of 230 representatives were surveyed: 20 business representatives (Dataset 6), 45 clergy representatives (Dataset 7), 26 community representatives (Dataset 8), 35 police representatives (Dataset 9), 36 school representatives (Dataset 10), and 68 service organization representatives (Dataset 11).

The Client Survey Data (Dataset 12) examine such topics as clients' involvement in the CeaseFire program, their satisfaction with aspects of life, and their opinions regarding the role of guns in neighborhood life. A total of 297 clients were interviewed.

Recent mass public shootings in venues as diverse as a school, a church, and a concert, have alarmed policymakers and the public alike. Despite mounting interest among journalists and academics, questions regarding the nature and prevention of mass shootings remain. For example, to what extent do mass shooters have histories of mental illness, substance abuse, or violence? Does strengthening or weakening gun control laws have an impact on the incidence or severity of mass public shootings? Are mass shooters influenced by media coverage of these events?

This study is comprised of seven datasets that contain information on mass shooting incidents between 1976 and 2020. Mass public shootings were defined as any event in which four or more individuals, not including the assailant(s), were killed by gunfire in a public setting within a 24-hour period, absent any associated criminal activity (such as a robbery, gang conflict, or illicit drug trade). Three of the datasets have information on characteristics of mass shooting incidents, offenders, victims; two have information on media coverage surrounding these events; and two have information on averted or thwarted mass shooting incidents.

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.

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.

The purpose of this research was to examine the influence of neighborhood social disorganization on the risk of homicide victimization, with focus on how community effects changed once individual-level characteristics were considered. This research integrated concepts from social disorganization theory, a neighborhood theory of criminal behavior, with concepts from lifestyle theory and individual theory of criminal behavior, by having examined the effects of both neighborhood-level predictors of disadvantage and individual attributes which may compel that person to behave in certain ways. The data for this secondary analysis project are from the 2004-2012 National Center for Health Statistics' (NCHS) National Health Interview Survey (NHIS) linked National Death Index-Multiple Causes of Death (MDC) data, which provided individual-level data on homicide mortality. Neighborhood-level (block group) characteristics of disadvantage that existed within each respondent's place of residence from the 2005-2009 and 2008-2012 American Community Surveys were integrated using restricted geographic identifiers from the NHIS.

As a syntax-only study, data included as part of this collection includes 38 SAS Program (syntax) files that were used by the researcher in analyses of external restricted-use data. The data are not included because they are restricted archival data from the NHIS from the Centers for Disease Control and Prevention combined with publicly available American Community Survey (ACS) block group level data.

The purpose of this research was to further understanding of why crime occurs where it does by exploring the spatial etiology of homicides that occurred in Washington, DC, during the 13-year period 1990-2002.

The researchers accessed records from the case management system of the Metropolitan Police, District of Columbia (MPDC) Homicide Division to collect data regarding offenders and victims associated with the homicide cases. Using geographic information systems (GIS) software, the researchers geocoded the addresses of the incident location, the victim's residence, and offender's residence for each homicide case. They then calculated both Euclidean distance and shortest path distance along the streets between each address per case. Upon applying the concept of triad as developed by Block et al. (2004) in order to create a unit of analysis for studying the convergence of victims and offenders in space, the researchers categorized the triads according to the geometry of locations associated with each case. (Dots represented homicides in which the victim and offender both lived in the residence where the homicide occurred; lines represented homicides that occurred in the home of either the victim or the offender; and triangles represented three non-coincident locations: the separate residences of the victim and offender, as well as the location of the homicide incident.) The researchers then classified each triad according to two separate mobility triangle classification schemes: Traditional Mobility, based on shared or disparate social areas, and Distance Mobility, based on relative distance categories between locations. Finally, the researchers classified each triad by the neighborhood associated with the location of the homicide incident, the location of the victim's residence, and the location of the offender's residence.

A total of 3 statistical datasets and 7 geographic information systems (GIS) shapefiles resulted from this study. Note: All datasets exclude open homicide cases. The statistical datasets consist of Offender Characteristics (Dataset 1) with 2,966 cases; Victim Characteristics (Dataset 2) with 2,311 cases; and Triads Data (Dataset 3) with 2,510 cases. The GIS shapefiles have been grouped into a zip file (Dataset 4). Included are point data for homicide locations, offender residences, triads, and victim residences; line data for streets in the District of Columbia, Maryland, and Virginia; and polygon data for neighborhood clusters in the District of Columbia.