While in prison, inmates can take part in various programs that aim to encourage their reintegration into society. These programs include vocational workshops, anger management and behavioral therapy. Yet, the effectiveness of these programs is still being debated. This policy brief addresses the critical question: can an offender become a law-abiding citizen during a short incarceration period? I examine the effects of a large-scale behavioral intervention aimed at high-risk inmates in prisons from Québec (Canada) and find the likelihood of recidivism drastically decreases in the short term. This policy brief provides an overview of the main findings from Arbour (2021).