I cannot believe he hung himself. I would have to see the picture of him hanging, and what he was hanging FROM, for there to be any plausibility. Most modern jails have no protrusions at a height that would allow for hanging in that nature. I'm sure the press weren't too inquisitive in this regard, and the prison certainly aren't releasing pictures.
100% assisted suicide; ie, execution. I don't consider it murder. Ask a guard (CO) from that jail and you will get the lowdown.