My main concern about keeping him in the same conditions for the rest of his life is that he’ll probably end up killing someone inside, most likely a guard. After all, if he has no hope of release, he just won’t give a shit. Something I’m sure the parole board will be thinking about.
The system made him the way he is now. They should shoulder some of the blame. Tough decision though, maybe they should give him a chance in open prison first?