The aim of this treatment module is to facilitate CJ-PMI understanding, recognizing, and modifying their substance misuse. The principles guiding the “Substance Abuse” treatment module are consistent with principles of psychosocial rehabilitation and the principles of Need and Responsivity from the Risk-Need-Responsivity model of corrections treatment. Consistent with the theoretical orientation of the CLCO program, this module incorporates a social-cognitive learning theory with structured exercises (including in and outside of group exercises) to facilitate participant change. In addition, this module incorporates motivational interviewing techniques to facilitate change. By addressing substance abuse within their mental illness, as well as their criminal propensities, participants will be better equipped to utilize skills that will facilitate improved outcomes including reduced criminal and psychiatric recidivism (e.g., absence of imprisonment, fewer jail days, fewer hospital days, improved psychosocial functioning—more good days).