Among possible solutions in response to violent behaviours of psychiatric patients, prosecution might not be an alternative as well-known. This measure may be potentially beneficial for patients. How can prosecution be chosen as an option when faced with violent patients? When this option is considered, how should it be applied and what are the different steps to follow? To answer these questions, it appeared essential to first proceed to a comprehensive reflection on the recourse of sanction in psychiatry. We then describe advantages and disadvantages of the judicial process. Finally, we illustrate applications as they were conceived and elaborated at the Clinique de dangerosité de l'Institut Philippe Pinel de Montréal.