The Court of Auditors has decided to put its nose in the Geneva prisons. Broad topic. The pretext: to assess the relevance of the concept of reintegration developed five years ago by the Cantonal Office of Detention (OCD). The observation is not a scoop: the measures proposed to get out of delinquency are adequate, but their implementation is strongly impacted by the chronic overpopulation of Champ-Dollon and by the reluctance that has gained political authority since tragic recurrences.