COLUMBUS, Ohio (AP) — Cleveland kidnapper Ariel Castro's death by hanging in his prison cell may not have been suicide after all but an ill-fated attempt to choke himself for a sexual thrill, authorities said in a report issued Thursday. The report also said two guards falsified logs documenting the number of times they checked on Castro before he died. Castro, 53, was found hanging from a bedsheet Sept. 3 just weeks into a life sentence after pleading guilty in August to kidnapping three women off the streets, imprisoning them in his home for a decade and repeatedly raping and beating them.