Describes a study which will establish a combined dataset “harmonizing” existing administrative databases to evaluate the effectiveness of the Massachusetts Department of Mental Health’s Forensic Transition Team (FTT). The FTT is a case coordinator-based reentry program that serves persons with serious mental illness (SMI) transitioning from prisons. As needed, the FTT coordinators advocate for clients by attending discharge-planning meetings, providing linkages to providers, and tracking clients’ progress for three months post-release. A Spanish translation of this publication is available for download.