I'm really confused here, what is the use of 'solitary' in a shared cell? He's either a threat to others or he's not. If he is, he should be on his own, not with a cell mate, why wouldn't he be a threat to the cell mate? And if he's not a threat to others, he shouldnt' be in solitary. Isn't that the point of solitary?
Still seems pretty pointless to put somebody else in the cell with him, but I guess that makes more sense. My speculation would be they have more in solitary than they have space for, but I'll avoid trying to infer anything from that.
It's not necessarily intended to get him alone - in fact they might intentionally want to avoid full isolation because it is massively problematic not just because of space but because of the dramatic mental health issues it can cause (have a look at the amount of mental health problems at the Supermax prisons). Note the restrictions on showering, and presumably there's lots of other restrictions on access to recreational facilities etc.. Could be abusive enough even before they decide to withdraw the last shred of human contact.
