The Advanced Supervision and Intervention Support Team (ASIST) program in Connecticut combines community supervision (pre-trial, probation, or parole) with clinical care and case management for individuals with mental illness, many of whom have a history of non-compliance. We conducted a quasi-experimental evaluation on 111 ASIST participants, with 6 month follow-up interviews, clinician ratings, and administrative data on arrest and incarceration. Those results suggest that program participation improved outcomes on employment, living situation, and substance use. In addition to pre-post comparisons, we also applied case-control propensity matching to compare 492 ASIST clients with 492 individuals who did not receive ASIST, and found that ASIST participants had longer survival time to re-incarceration than matched cases. We will also discuss outcomes related to mental health crisis and hospitalizations.