Community Policing

This program was a place-based crime policing initiative implemented for 1 year to reduce violent crime. Risk-based policing initiatives promote data-informed decisions based on a process of defining the problem, gathering information, and analyzing data. The program is rated Promising. The program resulted in a statistically significant reduction of 22.6 percent in violent crimes in the intervention areas, compared with the comparison areas.

This program equips police with on-officer cameras to record their interactions with civilians. The program is rated No Effects. Camera use had no statistically significant effects on officers’ total number of proactive activities, specifically on the number of traffic stops or business checks, nor on arrests, citizen complaints, and use-of-force incidents. Officers with cameras conducted statistically significantly fewer subject stops, and statistically significantly more park and walks.

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 policing strategy was designed to deter crime on platforms in high-crime areas of the London Underground. The program is rated Promising. Platforms in the treatment areas had statistically significant reductions in calls for services and crime, relative to the control group, on patrol and nonpatrol days.

This program equips police with body cameras to record encounters with civilians. The program is rated No Effects. Camera use had no statistically significant effects on number of arrests, arrests with force, and summonses issued after 1 year. Officers wearing cameras had statistically significant reductions in complaints filed against them and made more stop reports. Camera use resulted in a statistically significantly reduced likelihood of lawful stops and frisks but fewer subjects searched.

This is a police-driven, collaborative, place-based crime-reduction approach focused on a target neighborhood in Tulsa, Okla. The program is rated Promising. The initiative resulted in statistically significant reductions in total crime in both areas of the target neighborhood at the two post-intervention periods and a statistically significant reduction in burglary in one area. There were no statistically significant reductions in disorderly offenses and mixed results on the number of assaults.

This is a police substation operating within a business improvement district in Newark (N.J.) with the goal of reducing crime in the target area. The program is rated Promising. There were statistically significant reductions in burglary and motor vehicle theft in the treated area compared with a control area over the entire 6-year postintervention period. There were no statistically significant differences in robbery, aggravated assault, or theft from auto.

This program equips police with on-officer cameras to record contacts with civilians. The program is rated Promising. Body-worn camera use resulted in statistically significant decreases in citizen complaints, and there were mixed results regarding camera use on arrest rates. There were no statistically significant differences in citizen resistance. There was a statistically significant increase in use of force, and less proactive, officer-initiated contact.

This program equips police with on-officer cameras to record contacts with civilians during intimate-partner violence incidents. The program is rated Promising. Camera use was statistically significantly more likely to result in arrests, charges filed, cases furthered, and both guilty pleas and verdicts. There was no statistically significant difference in sentence length. However, there was a statistically significantly greater reduction in case processing time in cases not involving a camera.

This is a police training to develop officers’ decision-making, de-escalation, empathy, rapport-building, and self-control skills to discourage use of force in interactions with citizens. The program is rated No Effects. There was a statistically significant increase in procedural justice priorities posttraining in the treatment group, compared with the control group, but there were no statistically significant effects on maintaining self-control, physical control priorities, or use of force.

This is a brief policing intervention for improving public attitudes toward police, through positive nonenforcement police contact. The program is rated Promising. Compared with control residents, intervention household residents reported statistically significant improvements in attitudes toward police and more positive perceptions of police performance and legitimacy and greater willingness to cooperate with police. But there was no statistically significant effect on compliance with police.

This police-led program was designed to reduce gun crime and serious violence in the Wells Goodfellow neighborhood in St. Louis, Missouri. The program is rated No Effects. The intervention did not have a statistically significant effect on gun violence or total violence trends in the target neighborhood compared with the average trends of seven matched comparison neighborhoods across the city.

The program is designed to reduce officer use-of-force incidents and citizen complaints by providing body-worn cameras to officers in the Las Vegas (Nevada) Metropolitan Police Department. The program is rated Promising. There was a statistically significant reduction in police use-of-force and citizen complaints, and a statistically significant increase in arrests and citations for officers who wore the BWCs, compared with non-BWC control group.

This is a focused policing strategy to reduce calls for service and crime in hot spots using increased foot patrols by civilian police community support officers. The program is rated No Effects. Hot spots that were assigned civilian proactive police community support officers did not experience statistically significant reductions in calls for service or crime.

This intervention used two hot spots policing strategies (problem solving and directed patrol) to improve citizens’ perceptions of police in St. Louis, Mo. The program is rated No Effects. Although residents in both treatment groups reported a statistically significant increase in cooperation with the police, the preponderance of evidence suggests that the intervention had no significant impact on citizens’ perceptions of procedural justice, police legitimacy, or police abuse.

Police body-worn cameras are used to record police encounters with citizens during officers’ shifts in Birmingham South. Officers were instructed to begin recording as soon as they left their vehicles and to conclude recording once the situation was resolved. The program is rated Promising. There was a statistically significant reduction in officers’ use of force and citizen injury, but no statistically significant reduction in officer injury.

This is a police body-worm camera intervention that has been implemented across eight police departments in the United States and United Kingdom. The program equips officers with continuously recording body-worn cameras to record police and citizen interactions. The program is rated No Effects. There was no significant effect on police use of force, and use of cameras was associated with a statistically significant increase in assaults against officers.

This program combines enhanced employment opportunities and wraparound services for incarcerated persons before and after release from prison. The program is rated Promising. There was a statistically significant reduction in likelihood of rearrests for program group participants, compared with the control group. There was also a lower rate of reimprisonment for program participants than nonparticipants; however, this difference was not statistically significant.

This program equips individual police officers in Rialto, Calif., with body-worn cameras to record police encounters during shifts. The program aims to reduce use-of-force incidents and citizen complaints by increasing mutual accountability. The program is rated Promising. There was a statistically significant reduction in police use-of-force, but no statistically significant difference in citizens’ complaints.

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.

This experiment assessed the impact of two hot spots policing tactics on firearm violence. The program is rated Promising. Compared with comparison hot spots, hot spots that received self-initiated enforcement experienced a statistically significant reduction in firearm assault rates, but there were no statistically significant differences for hot spots that received directed patrol. There was no statistically significant effect on firearm robbery rates between treatment and comparison hot spots

This is a pre-booking, community-based diversion program designed to divert those suspected of low-level drug and prostitution offenses away from jail and prosecution and into case management and other supportive services. The program is rated Promising. The intervention group had a statistically significant lower likelihood of having been rearrested, compared with the control group. However, there was no statistically significant impact on non-warrant rearrests.

This is a law-enforcement model in which both location-based crime and automobile crash data is analyzed to determine where such incidents disproportionately occur (“hot spots”) and to employ targeted traffic enforcement strategies. The program is rated Promising. The areas of targeted enforcement experienced statistically significant declines in robberies, burglaries, and traffic crashes.

The program tested whether police use of a specialized script (based on principles of procedural justice) during random breath-test traffic stops could improve perceptions of police and change people’s views about drinking and driving. The program is rated Promising. The program was shown to have a statistically significant effect on changing views on police and on drinking and driving, on increasing satisfaction and compliance with police, and on strengthening perceptions of procedural justice.

This program consisted of a multi-agency partnership to prevent violence and reduce violence-related emergency room admissions in Cardiff, Wales. The program is rated Promising. The program showed a statistically significant reduction in the rates of total assaults, wounding assaults, and hospital admissions related to violence, compared with the comparison sites. However, there were no statistically significant differences between Cardiff and the comparison sites in the rate of common assaults.

This program was implemented in three midsized cities near the Los Angeles, California area, with the goal of examining effects on residents’ fear of crime, perceptions of collective efficacy and police legitimacy, and actual and perceived levels of crime and disorder. The program is rated No Effects. Findings revealed no statistically significant impacts on any of the dependent variables, suggesting no indication of either beneficial effects or “backfire” effects in targeted areas.

A crime reduction strategy in Richmond, Virginia implemented to deter former and persons with the potential to commit a crime from carrying and using firearms, with an overall goal of reducing firearm-related homicides. The project is rated Promising. Firearm-related homicides decreased significantly in the target area, compared with other U.S. cities where the program was not implemented.

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 consisted of a comprehensive, neighborhood-based, family-focused service delivery model that employed wraparound services and case management for justice-involved families with identified substance abuse problems. The program is rated Promising. Treatment group youth had a statistically significant decrease in noninstitutional and institutional out-of-home placements, compared with comparison group youth. However, there was no statistically significant difference in recidivism.

A problem-oriented policing strategy that aims to combat drug markets and the problems associated with them, in a high- crime neighborhood, through a deterrence-based, pulling levers framework. The program is rated Promising. The program was shown to significantly reduce nonviolent offenses in the target area, but not violent offenses.

A problem-oriented policing program that aims to eliminate overt drug markets and the problems associated with them through a deterrence-based, pulling-levers framework. The program is rated Effective. The Intervention had a statistically significant impact on reducing violent incidents in the target areas.

A program that attempts to reduce homicides and non-fatal shootings through a multidisciplinary and multiagency homicide review process. The program is rated Effective. There was a statistically significant, 52 percent, decrease, in the monthly count of homicides in the intervention districts.

This is a public surveillance system that includes a network of cameras and components for monitoring, recording, and transmitting video images to monitor crime in different areas of Baltimore, Md. The program is rated Promising. There was a statistically significant decrease in total monthly crime in the downtown, Greenmount, and tri-district areas of Baltimore between pretest and posttest. However, there was no statistically significant difference in the North Avenue area.

This was a saturation foot-patrol initiative implemented in Newark, N.J., in 2008 that aimed to reduce violent crime. The program is rated Promising. The target area that implemented the initiative experienced statistically significant reductions in overall violence and incidences of aggravated assault and shootings, compared with the control area. However, there was no statistically significant effect on incidences of murder or robbery.

This is a community-based program that brings police, local government agencies, and the community together to prioritize problems and prevention efforts in Chicago, Ill. The goal is to solve neighborhood crime problems, rather than react to only to their symptomatic consequences. The program is rated Promising. Police beats or geographical units that implemented the program experienced a statistically significant reduction in crime and calls to 911, compared with police beats that did not.

This is a neighborhood-based, intensive case-management approach to prevent drug use and delinquency for high-risk adolescents living in distressed neighborhoods. The program is rated No Effects. While treatment group youths had statistically significant reductions in the frequency of total violence and drug sales, there were no statistically significant effects on delinquency, property or status offenses, arrests and tickets, truancy, and disciplinary incidents or suspensions.

This is a place-based, problem-oriented policing strategy implemented by the Boston (Mass.) Police Department in response to a sudden increase in violent index crimes. The program is rated Promising. Treatment street units experienced statistically significant reductions in total violent index crime, robbery, and aggravated assault, compared with control street units. However, there was no statistically significant effect on incidents of homicide or rape/sexual assault.

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 problem-oriented policing program that offered a collection of enforcement and non-enforcement strategies designed to reduce homicide in Richmond, Calif. The initiative combined traditional law enforcement practices with prevention and intervention efforts that involved partnerships with the community, other city agencies, and local schools. This program is rated Promising. There was a statistically significant reduction of homicides following the implementation of the initiative.

This program consisted of a police patrol experiment, which was designed to reduce gun violence in Kansas City (Mo.) by placing extra police patrols in gun crime hot spots. The program is rated Promising. In the treatment area, there was a statistically significant increase in gun seizures and a statistically significant decrease in gun crimes, compared with the comparison area, in the 6 months following implementation.

This police foot patrol strategy involved rookie officers patrolling an average beat of 1.3 miles during one shift per day in hot spots in Philadelphia, PA. This program is rated Effective. Compared with the control areas, there were statistically significant reductions in reported violent crime in patrolled areas, although the effect faded once officers were removed from their targeted beats.

This is a hot spots policing program that targeted identified drug activity locations to reduce public disorder by engaging local residents and business owners and applying pressure through crackdowns. The program is rated Promising. The treatment group hot spots showed a statistically significant decrease in disorder-related offenses, compared with the control group hot spots. However, there were no statistically significant differences in violent or property offenses.

This is a geographically focused policing strategy to reduce violent crime in high-crime areas using problem-oriented policing (POP) and saturation/directed patrols. The program is rated No Effects. While there were no statistically significant reductions in any violent or property crime in POP hot spots, or in any violence or property crime in directed patrol hot spots, there were statistically significant reductions in nondomestic violent crime in POP hot spots compared with control hot spots.

This is a crime-reduction strategy that uses a disorder-policing approach to improve physical and social order in high-crime locations in Lowell, Mass. This program is rated Effective. High-crime locations experienced statistically significant reductions in calls for service and in social and physical disorder, compared with control areas.

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 program that increased police presence in crime “hot spots” to reduce criminal activity in Minneapolis, Minn. The program is rated Effective. Experimental hot spots experienced statistically significant reductions in citizen calls to police and observed disorder, compared with control hot spots.

This is a multi-agency team-based, drug-control program in Oakland, Calif., which is designed to reduce drug-related problems and improve habitation conditions at targeted problem areas. The program is rated Effective. Treatment areas experienced a statistically significant decrease in police contacts following the implementation of the program.

This is a community-based approach to reducing and preventing crime while revitalizing the community. This program is rated No Effects. There were no statistically significant differences in rates of violent crime between the treatment and comparison areas following the crackdown. However, drug offenses increased significantly in the treatment areas, compared with the comparison areas.

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.

This is a policing program that used community mobilization, strategic planning, and pulling-levers notifications to reduce drug dealing in a high-crime area in Nashville, Tenn. The program is rated Promising. At the postintervention, there was a statistically significant decline in drug crime incidents in the target area, compared with the adjacent comparison area and the rest of Nashville. But there were no statistically significant effects on violent or property offenses or calls for service.

This is a policing program designed to reduce crime through the management of police resources in Fort Worth, Texas. The program is rated Promising. Following the implementation of Compstat in Fort Worth, there was a statistically significant reduction in rates of overall crime and property crime, and a statistically significant increase in arrests for minor nuisance offenses. However, there were no statistically significant effects on violent crime rates.

This is a nonprofit organization created by neighborhood property owners or merchants to provide services, activities, and programs to promote local improvements and public safety. The program is rated Promising. The treatment areas experienced statistically significant reductions in overall crime, serious crime, less serious crime, and arrests compared with the matched control group areas.