Prosecution

The program focuses on reducing violent gun crime by disrupting the cycle of gun violence by relying on forensic science and data analysis to identify, investigate, and prosecute individuals who use guns in criminal activity, and the sources of their guns. The program is rated No Effects. The program did not significantly affect homicides or aggravated assaults with a firearm but was shown to significantly reduce violent crime and robbery with a firearm.

This is a collaborative law enforcement effort to collect, manage, and analyze crime gun evidence to identify serial shooters, disrupt criminal activity, and prevent future gun violence. The program is rated Promising. Posttest gun crime cases saw statistically significant increases in the likelihood of arrest, but no statistically significant difference in the likelihood of being charged or convicted, compared with cases in the pretest period.

This is a prosecutor-led pretrial diversion program to rehabilitate individuals convicted of misdemeanor or felony offenses who are at medium risk of reoffending. The program is rated No Effects. There were statistically significant reductions in cases dismissed for treatment group individuals, compared with control group individuals. However, there were no statistically significant differences in the 2-year rearrest rate or days to first rearrest.

This is a prosecutor-led pretrial diversion program to rehabilitate individuals with misdemeanor or felony offenses who are at low risk of reoffending. The program is rated Effective. There were statistically significant reductions in the rearrest rate, days to rearrest, and cases dismissed for treatment group individuals, compared with comparison group individuals, at the 2-year follow-up.

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 prosecutor-led diversion program for nonviolent defendants, which is designed to decrease the number of convictions and reduce recidivism while improving administrative efficiency and cost effectiveness. The program is rated No Effects. The program had a statistically significant effect on reducing the likelihood of conviction, but there was no statistically significant effect on recidivism for program participants, compared with comparison participants.

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 diversion program in which juveniles ages 13–18, who have committed non-violent offenses, study works of literature and classic virtue theory in small groups, led by trained volunteer mentors. The goal is to foster moral development and reduce recidivism. The program is rated Promising. Participants had a statistically significantly lower chance of being prosecuted for any offense (including misdemeanors and felonies) and fewer arrests than the comparison group.

The program uses specially trained nurses to provide comprehensive psychological, medical, and forensic services to recent sexual assault victims in either hospital- or community-based clinic settings. The program is rated Promising. Across multiple sites, the results showed that sexual assault cases that were prosecuted following implementation of SANE had a statistically significant greater likelihood of resulting in a guilty plea or conviction.

A Tax Compliance Experiment was conducted in Israel and sought to test whether taxpayer compliance could be increased by mailing two different types of letters to incorporated taxpayers: a deterrent letter or moral persuasion letter. The program is rated No Effects. There were no statistically significant differences between the corporate taxpayer treatment groups and the control group in the likelihood of paying taxes or the likelihood of accurately reporting tax deductions and gross sales.

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 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 program involved cooperation between police and prosecutors to increase the likelihood that high-risk individuals would be convicted and incarcerated. The program is rated Promising. The experimental group had a statistically significant greater likelihood of being sentenced to prison and having longer prison sentences, compared with the control group. However, there was no statistically significant difference for conviction rates between the groups.

This program consists of a specialized police unit, which was designed to prevent recidivism among people convicted of domestic violence offenses and to assist victims of domestic violence through the process of prosecution and recovery. The program is rated Promising. The treatment group assigned to the Domestic Violence Unit had a statistically significant lower likelihood of recidivating, compared with the control group, who were assigned to standard patrol.

This was an experiment to evaluate the impact of deoxyribonucleic acid (DNA) evidence collection and testing on the investigation of high-volume property crimes. The program is rated Effective. Across five sites, more suspects were identified, arrested, and prosecuted in the treatment group cases, compared with suspects in the control group cases. These differences were statistically significant.

This program is the first prosecution-led, residential drug treatment diversion program designed to divert people convicted of nonviolent felony drug offenses to community-based residential treatment. This program is rated Promising. Controlling for time spent in the community following release from prison, the intervention showed statistically significant positive effects on recidivism, time to first rearrest, and rearrest for program participants, compared with the control group.