"Auto-erotic asphyxiation" cited as possible Ariel Castro death cause By Stephanie Gallman, CNN October 10, 2013 -- Updated 1844 GMT (0244 HKT) NEW: Officials probe whether death was result of auto-erotic asphyxiation Guards appeared to have falsified logs "for their rounds," prisons agency says The Cleveland kidnapper pleaded guilty in August and hanged himself last month Castro's body was found with an open Bible and pictures of his family (CNN) -- An investigation into the prison cell suicide of Cleveland kidnapper Ariel Castro found that he may have died by accident last month because of "auto-erotic asphyxiation." The probe also found that two prison guards didn't perform required rounds at the facility and falsified records. Castro was found in his cell with a Bible open to John Chapters 2 and 3 and "had pictures of his family out and arranged in a poster-board fashion," according to a report released Thursday by the state Department of Rehabilitation and Correction. Ariel Castro's son describes personal torment after father's crimes He was hanging from a hinge in the window of his cell by a sheet wrapped around his neck. His pants and underwear were pulled down to his ankles. The relevance of this finding is unclear. These facts, however, were relayed to the Ohio State Highway Patrol for consideration of the possibility of auto-erotic asphyxiation," the report said. Auto-erotic asphyxiation involves depriving the brain of oxygen by controlled strangulation to intensify a sexual experience. The department said "there appears to be no known, substantiated motivation for the self-inflicted death." Officials "reviewed several sources of information in an attempt to determine the motivation" for the suicide since "Castro left no suicide note and had previously shown no suicidal ideations in multiple levels of assessment." Also, the agency said, two prison guards responsible for checking on him "did not timely perform" required rounds, the department said. They appeared to have also falsified "the post log book for their rounds." The information was disclosed in an "after-action review report" issued by the department. Castro, who was held at the Correctional Reception Center in Orient, was found hanged with a bed sheet in his cell September 3. Prison medical staff tried to revive him. The guards were placed on leave as investigators looked into Castro's suicide. Any disciplinary action, which could include termination of employment, will be determined by the Ohio State Highway Patrol at the conclusion of its investigation. Castro pleaded guilty in August to 937 counts, including the kidnapping of Michelle Knight, Georgina DeJesus and Amanda Berry. He held the women for roughly 10 years in his home. Castro was sentenced to life plus 1,000 years. Ohio women found September 4, 2013 -- Updated 2236 GMT (0636 HKT) Ariel Castro who was sentenced to life plus 1,000 years for kidnapping, raping and holding captive three women was found hanging in his prison cell, authorities said told CNN affiliate WOIO. August 1, 2013 -- Updated 1632 GMT (0032 HKT) Amanda Berry and Gina DeJesus weren't in the courtroom. But their diaries gave authorities a window into the horror they suffered for a decade. August 5, 2013 -- Updated 1038 GMT (1838 HKT) Michelle Knight, one of three women kidnapped by Ariel Castro, returned Friday to the Cleveland house where she was chained up and tormented for 11 years, a neighbor said. August 1, 2013 -- Updated 1822 GMT (0222 HKT) When her chance came, kidnapping victim Michelle Knight lit into Ariel Castro, the man who held her captive and raped her in his Cleveland home for a decade. July 9, 2013 -- Updated 1406 GMT (2206 HKT) For the first time since their rescue, the world is hearing directly from the three women who were held captive in Cleveland for a decade. July 30, 2013 -- Updated 1151 GMT (1951 HKT) In his first television interview, Ariel Castro's son said that his dad belongs in prison for the rest of his life and he doesn't plan on ever visiting him. August 1, 2013 -- Updated 1710 GMT (0110 HKT) For the first time, take a look inside the Cleveland house where three women were held captive for a decade. August 1, 2013 -- Updated 1150 GMT (1950 HKT) When an judge denied a request for Castro to visit the 6-year-old girl he fathered with one of the women he kidnapped and raped, the reason seemed pretty clear. May 13, 2013 -- Updated 1055 GMT (1855 HKT) How the macabre enslavement of two girls and a woman began has deeply disturbed a nation, if not the world. May 19, 2013 -- Updated 1537 GMT (2337 HKT) When the police arrived at Castro's house, it was almost peaceful. As if nobody else was there. And then they heard the sound of scurrying feet upstairs. May 13, 2013 -- Updated 1453 GMT (2253 HKT) Ariel Castro's brothers say he's "a monster" who should rot in jail and they "want the world to know" they had no idea their brother was holding women captive. August 1, 2013 -- Updated 1200 GMT (2000 HKT) Two were just teenagers when they were kidnapped, but the three women have finally been found a decade later. May 8, 2013 -- Updated 0933 GMT (1733 HKT) When Amanda Berry screamed for help through a crack in the front door of the house where she was being held, she set in motion an end to roughly a decade of captivity for herself and two other women. May 10, 2013 -- Updated 1319 GMT (2119 HKT) His Cleveland neighbors are trying to come with grips with the two personas -- the first, they thought they knew, the other, the one that authorities describe.