He's on permanent lockdown, so his meals are delivered. The problem is the guards overreact to everything he does. Even after he's tazed or unconscious, they keep beating on him.
And I guess you've tried keeping the guards from going near him? Keeping their patrols away from his cell? Can you stick them outside of the entrance to DR so they never actually enter the cell area?
When he starts destroying things in his cell, guards come rushing from all over. It takes a lot of micromanagement to keep the guards away when he starts rioting. It's getting to the point I might stick him in rival gang territory.
The other DR inmate is a model prisoner, and I'll feel bad if he gets fried.