Gangs

This is a specialized court program that targets high-risk gang-affiliated individuals with felony convictions for intensive supervision, with the goal of reducing recidivism. The program is rated Promising. Gang members who participated in the program had a statistically significant lower likelihood of probation revocation than gang members who did not participate. But there were no statistically significant differences in new arrests between the groups.

This was a focused deterrence intervention designed to reduce the presence of gun violence and gang activity. The program is rated Promising. There was a statistically significant reduction in confirmed shots fired, residents’ reports of hearing gunshots, and residents’ reports of seeing gang activity. However, there was no statistically significant impact on calls for service for shots fired.

This is a focused deterrence police strategy that was designed to reduce gang- and group-related violence in Detroit, Mich. The program is rated No Effects. There were no statistically significant differences found for weapons arrests or shooting victimizations for participants in two age groups (15–24 and 25–34). The program did show a statistically significant reduction in all arrests and violent arrests for individuals who attended the Detroit Ceasefire call-in meetings.

This was a focused deterrence violence-reduction strategy involving enforcement and services to targeted individuals to address gun and gang violence. The program is rated Promising. There were statistically significant reductions in community-level criminal shootings in treated areas, compared with matched comparison areas, and in shootings around treated gang territories, compared with areas around matched comparison gang territories, at 2 years’ postimplementation.

This secondary violence prevention program targets young men most likely to commit or be victim of gang or gun crime to reduce their incarceration and victimization from violent crime. The program is rated Promising. SSYI youths were statistically significantly less likely to be incarcerated compared with comparison group youths. SSYI–funded cities had statistically significant reductions in all measured city-level crime victimization rates, compared with comparison cities.

This is a focused-deterrence group violence reduction strategy (GVRS) designed to reduce or control gun violence in Oakland, Calif. The program is rated Effective. The intervention was shown to reduce total shootings, gang-involved shootings, suspected gang-involved shootings, and gang shooting victimizations in treatment block groups relative to matched comparison block groups. These differences were all statistically significant.

An FBI-led, anti-gang strategy in Los Angeles, California, designed to reduce neighborhood-level violent crime through the identification, disruption, and dismantling of violent street gangs. This program is rated Effective. Results indicated a statistically significant 22 percent reduction per month in violent crime between the treatment areas and the comparison areas.

This focused deterrence strategy in New Orleans, Louisiana, aims to reduce gang violence and homicide. The program is rated Effective. There were statistically significant reductions found in overall homicide, firearm-related homicide, gang member-involved homicide, and firearm assault from the pretest to the posttest period. Further, New Orleans showed significantly decreased homicide rates after the program was implemented, compared with 14 cities with similar violent crime rates.

A crime focused initiative, designed to address gang-related gun homicides in selected cities. The initiative involved a comprehensive model of suppression (enforcement), prevention, and reentry. The program is rated Promising. There was a significant reduction in gun homicides related to gang crime in cities that implemented the initiative.

This program monitors and tracks the movement of those on parole categorized as high risk for gang involvement or activity. The program is rated Promising. They are monitored by the GPS program had statistically significantly less arrests for new offenses and violent offenses, compared with control group people on parole. However, treatment group participants had higher odds of technical violations.

This program consists of a judicial intervention, which seeks to improve the prosecution of gang-related crimes. The program is rated Promising. Treatment group cases were associated with a statistically significant greater number of convictions and incarcerations of gang members, and a lower number of case dismissals and rejections, compared with control group cases. However, there was no statistically significant effect on the rate of pleas.

This is a comprehensive gang violence reduction program designed for the Little Village neighborhood of Chicago. The program is rated Promising. Treatment group youth who participated in the program had statistically significant reductions in total violent crime, serious violent crime, and drug crime arrests, compared with control group youth. However, there was no statistically significant difference in property crime arrests or total arrests.

This is a comprehensive, multiyear program designed to reduce youth gang crime and violence. The program is rated Promising. The target area demonstrated a statistically significant reduction in calls for shots fired and gang-related incidents compared with the comparison area. However, there were no statistically significant impacts on calls for vandalism, incidents of serious violence, gang-related incidents of serious violence, or student attendance.

This is a comprehensive antiviolence initiative that uses collaborative strategies to alter perceived costs and benefits of gun violence and is intended to reduce illegal gun offending. The program is rated Promising. Treatment areas experienced a statistically significant reduction in homicide and gun-related homicides, but no reduction in gang-related homicides. In addition, offender notification forums were associated with statistically significant reductions in recidivism rates.

This is a school-based, gang- and violence-prevention program, which is designed to teach youth to avoid gang membership and to develop positive relationships with law enforcement. The program is rated Promising. Treatment group students had a statistically significant lower likelihood of being in a gang, compared with control group students, at the 1-year follow up. However, there were no statistically significant differences between groups in delinquency or in violent offending.

This is a problem-solving police strategy, which was designed to reduce gang violence, illegal gun possession, and gun violence in communities in Boston, Mass. The program is rated Effective. There were statistically significant reductions in youth homicide, citywide gun assaults, calls for service, and recovered new guns following implementation of the intervention.

This is a focused-deterrence policing initiative designed to reduce gun homicide in Stockton, Calif., by providing gang-involved youth with positive alternatives to violence. The program is rated Promising. The intervention was associated with a statistically significant 42 percent decrease in the monthly number of gun homicides, compared with pre-intervention trends.

This is a policing program that targeted high-risk persons who chronically commit offenses to reduce gun violence in Indianapolis, Ind. The program is rated Promising. There was a statistically significant reduction in the number of average monthly homicides and gang-related homicides in Indianapolis, in the 2 years following the implementation of the program.

This was a policing initiative that targeted specific gangs in the Hollenbeck area of Los Angeles, California, through aggressive enforcement and problem-oriented policing. The program is rated Promising. There was a statistically significant reduction in overall violent crimes in targeted blocks, compared with matched comparison blocks. However, there was no statistically significant effect on gang crimes or gun crimes.