where a lot of people in general population don't understand that. i wish they had more programs like rtu all over, you know, the country because a lot of mentally ill people are ending up in prisons. >> for inmate joseph garner, processing his horrific crime has been the hardest part of his punishment. >> i have been down 9 1/2 years. i got 22 1/2 more to go. i've been -- my crime is murder, and i cannibalized during the process. >> on christmas night, 1996, joseph thought his father was preventing the second coming of christ. >> i tackled him from behind and somehow got around behind him and slit his throat. and i remember him saying, "please don't kill me." and that's when i realized, oh, my god, what am i doing? i said whatever is done has already been done. by this time, i'm totally wigged out and i pulled his brain out,