The purpose of this study was to address the critical need to improve accuracy in risk assessment for prison misconducts and hence improve decision-making. With the increased prison crowding in the correctional facilities in Quebec, there is a critical need for the development of better instruments to assist clinicians in their task. Since February 2007, all offenders sentenced for a violent crime or to six month or more are now evaluated with the French-Canadian version of the LS/CMI. Although the LS/CMI is generally good at predicting recidivism, it was not specifically designed to predict prison misconducts. The present study investigates the potential predictive validity of the LS/CMI. The sample consisted of 934 male offenders sentenced for a violent crime or to 6 month or more in the Correctional Services of Quebec between February 2007 and December 2007. In general, results indicate that the LS/CMI can predict violent and non violent misconducts.