Over two-thirds of youth participating in the Advocate, Intervene, Mentor (AIM) program in New York City completed the program without being resentenced to a juvenile residential facility. Further, only 3 percent of participants had any felony reconviction within 12 months of completing the program. These key findings demonstrate the promise of the AIM program, an individualized mentoring program for high-risk youth on probation in New York City. Over the course of six to nine months, AIM matches youth with adult advocate-mentors to provide one-on-one mentoring activities and work with youth to achieve an array of prosocial goals. This report documents Urban's evaluation findings related to the implementation of AIM and participant outcomes, including successes and challenges of program implementation as well as participants' placement, justice, and goal attainment outcomes. This report also identifies several recommendations intended to strengthen the implementation of the AIM program.