evidence: To help readers put this research to work on reducing incarceration, the report offers nine recommendations for state and local justice systems: [...] Credible Messengers is an approach where adults who have been involved in the criminal legal system, typically from the same neighborhoods where many court-involved youth live, mentor young people and help them adopt more positive attitudes and values. A 2018 evaluation found that just 26% of 13-18 year-old New York City youth on probation who worked with credible messenger mentors as part of the Advocate, Intervene, Mentor (AIM) alternative-to-incarceration program were arrested on new charges in the year after enrolling, and just 10% were arrested on felony charges. These rates are far lower than the rates typical for youth who were placed in residential programs historically (49 percent total arrest rate, and 27 percent for felony arrests).111 New York City’s ARCHES program, which offers credible messenger mentors for youth on probation aged 16-24, reduced reconviction rates by more than 50% in the two years after program enrollment compared to a control group, a recent evaluation found. Program results were the most positive for participants under age 18.112