ohio corrections officials resport castro committed suicide. they found him at 9:20 p.m. tuesday. the question for many is, how could it happen? he was separated from the prison population and supposedly under protective custody, checked every half hour. his family is shocked. they don't have suspicions but do that questions. the family has raised that question. it doesn't feel right. there's no note, we don't know, did he write a suicide note? >> reporter: authorities aren't giving details. an investigation is under way. his mother and sister last visited him ten days ago and noticed a change, the clear signs of depression. >> his body language, tone of voice, his conversation, he wasn't as conversational.