Law Enforcement

Police-initiated pedestrian stops involve police officers’ stopping, questioning, and investigating pedestrians on the street, usually based on suspicion of criminal behavior or activity. Generally, the goal of the stops is to prevent or reduce the occurrence of crime and disorder. The practice is rated Promising for reducing measures of crime and displacement but was rated Ineffective for improving measures of mental and physical health of citizens who were stopped by police.

This practice encompasses a wellness intervention that seeks to reduce the negative impact of stress on police officers, to improve their mental health outcomes. The practice is rated Effective for improving measures of depression, anxiety, and burnout. The practice is rated Ineffective for improving measures of sleep quality.

This practice utilizes a multi-tiered system of supports designed to make schools more effective in establishing a school culture and building a behavioral supports system to improve students’ behavioral, social, emotional, and academic outcomes. It involves three tiers of support, including both prevention and intervention efforts. The practice is rated Promising for reducing students’ problem behaviors.

This practice involves the use of body-worn cameras by law enforcement. The aim of this practice is to record interactions from an officer’s point of view to improve accountability and positively affect police officer behavior. The practice is rated Ineffective for its effects on officer use of force, officer injuries, officer-initiated calls for service, traffic stops, field interviews, and arrest incidents.

Red-light cameras are a traffic enforcement mechanism that permit police to remotely enforce traffic signals, to deter red-light running at signalized intersections. Red-light cameras are a fully automated photo detection system that includes cameras, sensors or triggers, and a computer. The practice is rated Promising for reducing total injury crashes. The practice is rated Ineffective for reducing total crashes, total property-damage-only crashes, or total red-light-running crashes.

This practice consists of talk-based therapies aimed at reducing violent, aggressive, or antisocial behavior of adults with a history of violent offending. Therapies include cognitive-behavioral therapy, anger management programs, and violence reduction programs. This practice is rated Promising for reducing trait anger and impulsivity and for improving social problem solving, and general social skills. This practice is rated Ineffective for reducing antisocial cognitions.

This practice includes programs that are designed to reduce recidivism among adults by improving their behaviors, skills, mental health, social functioning, and access to education and employment. They may become participants in rehabilitation programs during multiple points in their involvement with the criminal justice system. This practice is rated Promising for reducing recidivism among adults who have been convicted of an offense.

Geographically focused policing initiatives increase the presence and visibility of police officers at specific high-crime locations to significantly reduce crime and disorder. This practice is rated Promising for reducing crime in treatment areas relative to control areas.

This practice includes programs that are designed to deter youth from joining gangs. Programs can be delivered either to a universal population (i.e., all youth regardless of risk level), or to youth identified as being at-risk for gang membership. Programs include preventive awareness strategies and gang membership prevention strategies. The practice is rated Promising for reducing the likelihood that youth will join a gang.

This practice comprises specialized police-led, pre-booking jail diversion responses to individuals with mental illness. The goals are to reduce police officers’ injuries and use of force, and to reduce arrests of individuals with mental illness. The practice is rated Ineffective for reducing arrests of individuals with mental illness and reducing trained police officers’ use of force in situations involving mentally ill individuals.

This practice involves correctional programs that focus on the transition of individuals from prison into the community. Reentry programs involve treatment or services that have been initiated while the individual is in custody and a follow-up component after the individual is released. The practice is rated Promising for reducing recidivism.

Juvenile curfew laws are designed to restrict juveniles (below ages 17 or 18) from public places during specific hours such as nighttime (e.g., between 11 p.m. and 6 a.m.) or during the school day (e.g., 8:30 a.m. to 1:30 p.m.). The primary purpose is to reduce juvenile crime and victimization by keeping them at home with their families or in school. This practice is rated Ineffective for reducing juvenile crime during curfew hours.

This practice uses qualified nurses who are trained to collect forensic evidence in cases of rape and sexual assault (of both adults and children). The practice is rated Effective for providing treatment for sexually transmitted infections and emergency contraception to sexual assault/rape victims but is rated Ineffective for the proportion of complainants who had a rape kit collected.

This practice includes targeted-policing approaches for reducing drug and drug-related offenses. This practice is rated Promising in reducing reported, drug-related calls for services and offenses against persons. This practice is rated Ineffective in reducing reported property offenses, public order calls for service, and total offenses.

Counterterrorism includes strategies, policies, practices, interventions, or tactics that are designed to prevent or respond to terrorism. Target hardening at airports is an example of a defensive counterterrorism intervention that is designed to increase the detection of potential terrorism by placing metal detectors in airports and increasing security screening of passengers before they board planes. This practice is rated Promising for significantly reducing events of airplane hijackings.

An intervention strategy that redirects youths away from formal processing in the juvenile justice system, while still holding them accountable for their actions. The practice is rated Promising for reducing recidivism rates of juveniles who participated in diversion programming compared with juveniles who were formally processed in the justice system.

Reducing gun violence is a persistent public policy concern for communities, policymakers and leaders. To reduce gun violence, several strategies have been deployed including public health approaches (e.g., training and safe gun storage); gun buy-back programs; gun laws; and law enforcement strategies. The practice is rated Promising for reducing violent gun offenses.

These analytic methods are used by police to develop crime prevention and reduction strategies. The practice is rated Promising and led to a significant decline in crime and disorder.

Public surveillance systems include a network of cameras and components for monitoring, recording, and transmitting video images. Public surveillance cameras are designed to reduce both property and personal crime. This practice is rated Promising for reducing overall crime, property crime, and vehicle crime, and rated No Effects for impacting violent crime.

These programs consist of home visits by a crisis response team to follow-up on the initial police response to reports of family violence. The practice is rated No Effect for violent offenses —s the odds of reporting new abuse to the police were slightly higher for households that were assigned to receive a home visit through a second responder program. The practice is rated Ineffective on victimization (i.e. the intervention had no statistically significant effect on victims' reports of abuse).

This practice (also referred to as “pulling-levers policing”) includes problem-oriented policing strategies that follow the core principles of deterrence theory. The strategies target specific criminal behavior committed by a small number of individuals who chronically commit offenses, such as youth gang members or those who repeatedly commit violent offenses, who are vulnerable to sanctions and punishment. The practice is rated Promising for reducing crime.

Hot spots policing strategies focus on small geographic areas or places, usually in urban settings, where crime is concentrated. Through hot spots policing strategies, law enforcement agencies can focus limited resources in areas where crime is most likely to occur. This practice is rated Effective for reducing overall crime and rated Promising for reducing violent, property, public order, and drug and alcohol offenses.

Police-initiated pedestrian stops involve police officers’ stopping, questioning, and investigating pedestrians on the street, usually based on suspicion of criminal behavior or activity. Generally, the goal of the stops is to prevent or reduce the occurrence of crime and disorder. The practice is rated Promising for reducing measures of crime and displacement but was rated Ineffective for improving measures of mental and physical health of citizens who were stopped by police.

This practice encompasses a wellness intervention that seeks to reduce the negative impact of stress on police officers, to improve their mental health outcomes. The practice is rated Effective for improving measures of depression, anxiety, and burnout. The practice is rated Ineffective for improving measures of sleep quality.

This practice utilizes a multi-tiered system of supports designed to make schools more effective in establishing a school culture and building a behavioral supports system to improve students’ behavioral, social, emotional, and academic outcomes. It involves three tiers of support, including both prevention and intervention efforts. The practice is rated Promising for reducing students’ problem behaviors.

This practice involves the use of body-worn cameras by law enforcement. The aim of this practice is to record interactions from an officer’s point of view to improve accountability and positively affect police officer behavior. The practice is rated Ineffective for its effects on officer use of force, officer injuries, officer-initiated calls for service, traffic stops, field interviews, and arrest incidents.

Red-light cameras are a traffic enforcement mechanism that permit police to remotely enforce traffic signals, to deter red-light running at signalized intersections. Red-light cameras are a fully automated photo detection system that includes cameras, sensors or triggers, and a computer. The practice is rated Promising for reducing total injury crashes. The practice is rated Ineffective for reducing total crashes, total property-damage-only crashes, or total red-light-running crashes.

This practice consists of talk-based therapies aimed at reducing violent, aggressive, or antisocial behavior of adults with a history of violent offending. Therapies include cognitive-behavioral therapy, anger management programs, and violence reduction programs. This practice is rated Promising for reducing trait anger and impulsivity and for improving social problem solving, and general social skills. This practice is rated Ineffective for reducing antisocial cognitions.

This practice includes programs that are designed to reduce recidivism among adults by improving their behaviors, skills, mental health, social functioning, and access to education and employment. They may become participants in rehabilitation programs during multiple points in their involvement with the criminal justice system. This practice is rated Promising for reducing recidivism among adults who have been convicted of an offense.

Geographically focused policing initiatives increase the presence and visibility of police officers at specific high-crime locations to significantly reduce crime and disorder. This practice is rated Promising for reducing crime in treatment areas relative to control areas.

This practice includes programs that are designed to deter youth from joining gangs. Programs can be delivered either to a universal population (i.e., all youth regardless of risk level), or to youth identified as being at-risk for gang membership. Programs include preventive awareness strategies and gang membership prevention strategies. The practice is rated Promising for reducing the likelihood that youth will join a gang.

This practice comprises specialized police-led, pre-booking jail diversion responses to individuals with mental illness. The goals are to reduce police officers’ injuries and use of force, and to reduce arrests of individuals with mental illness. The practice is rated Ineffective for reducing arrests of individuals with mental illness and reducing trained police officers’ use of force in situations involving mentally ill individuals.

This practice involves correctional programs that focus on the transition of individuals from prison into the community. Reentry programs involve treatment or services that have been initiated while the individual is in custody and a follow-up component after the individual is released. The practice is rated Promising for reducing recidivism.

Juvenile curfew laws are designed to restrict juveniles (below ages 17 or 18) from public places during specific hours such as nighttime (e.g., between 11 p.m. and 6 a.m.) or during the school day (e.g., 8:30 a.m. to 1:30 p.m.). The primary purpose is to reduce juvenile crime and victimization by keeping them at home with their families or in school. This practice is rated Ineffective for reducing juvenile crime during curfew hours.

This practice uses qualified nurses who are trained to collect forensic evidence in cases of rape and sexual assault (of both adults and children). The practice is rated Effective for providing treatment for sexually transmitted infections and emergency contraception to sexual assault/rape victims but is rated Ineffective for the proportion of complainants who had a rape kit collected.

This practice includes targeted-policing approaches for reducing drug and drug-related offenses. This practice is rated Promising in reducing reported, drug-related calls for services and offenses against persons. This practice is rated Ineffective in reducing reported property offenses, public order calls for service, and total offenses.

Counterterrorism includes strategies, policies, practices, interventions, or tactics that are designed to prevent or respond to terrorism. Target hardening at airports is an example of a defensive counterterrorism intervention that is designed to increase the detection of potential terrorism by placing metal detectors in airports and increasing security screening of passengers before they board planes. This practice is rated Promising for significantly reducing events of airplane hijackings.

An intervention strategy that redirects youths away from formal processing in the juvenile justice system, while still holding them accountable for their actions. The practice is rated Promising for reducing recidivism rates of juveniles who participated in diversion programming compared with juveniles who were formally processed in the justice system.

Reducing gun violence is a persistent public policy concern for communities, policymakers and leaders. To reduce gun violence, several strategies have been deployed including public health approaches (e.g., training and safe gun storage); gun buy-back programs; gun laws; and law enforcement strategies. The practice is rated Promising for reducing violent gun offenses.

These analytic methods are used by police to develop crime prevention and reduction strategies. The practice is rated Promising and led to a significant decline in crime and disorder.

Public surveillance systems include a network of cameras and components for monitoring, recording, and transmitting video images. Public surveillance cameras are designed to reduce both property and personal crime. This practice is rated Promising for reducing overall crime, property crime, and vehicle crime, and rated No Effects for impacting violent crime.

These programs consist of home visits by a crisis response team to follow-up on the initial police response to reports of family violence. The practice is rated No Effect for violent offenses —s the odds of reporting new abuse to the police were slightly higher for households that were assigned to receive a home visit through a second responder program. The practice is rated Ineffective on victimization (i.e. the intervention had no statistically significant effect on victims' reports of abuse).

This practice (also referred to as “pulling-levers policing”) includes problem-oriented policing strategies that follow the core principles of deterrence theory. The strategies target specific criminal behavior committed by a small number of individuals who chronically commit offenses, such as youth gang members or those who repeatedly commit violent offenses, who are vulnerable to sanctions and punishment. The practice is rated Promising for reducing crime.

Hot spots policing strategies focus on small geographic areas or places, usually in urban settings, where crime is concentrated. Through hot spots policing strategies, law enforcement agencies can focus limited resources in areas where crime is most likely to occur. This practice is rated Effective for reducing overall crime and rated Promising for reducing violent, property, public order, and drug and alcohol offenses.