This report, part of the Office’s continuing focus on prevention of deaths in custody, consists of a comprehensive review of all completed acts of suicide (n=30) that occurred in federal penitentiaries in the three year period between April 2011 and March 2014. [...] The Office was prompted to undertake this review in light of a number of concerning developments that, when considered together, suggest that progress has stalled in CSC’s efforts to prevent and publicly account for deaths in custody: 1. Persistent concern about the disproportionate number of prison suicides that continue to occur in segregation cells under conditions of close monitoring and super [...] The Board of Investigation (or BOI) that is convened produces a standardized report that includes a description of the events prior to and after the incident leading to death, as well as a review of policy and legal compliance. [...] However, for the overwhelming majority of inmates who took their lives in segregation cells, the placement appears to not have been safe, regardless of the length or purpose of the placement. [...] Indeed, the United Nations Special Rapporteur of the Human Rights Council has called for an absolute prohibition on the use of segregation in excess of 15 days and has further declared the practice of solitary confinement of persons with known mental disabilities of any duration as being cruel, inhuman or degrading treatment, and, as such, in violation of international law.24.