Some are right-wing religious crazies, some are just thugs who identify with Nazi brutality. Some call themselves Aryan Brotherhood. About half of them are prisoners. The rest are staff. They are narrow dog-runs constructed of cyclone fencing, dozens of them lined up side by side.
Prison makes criminals worse.
They can't strike out at their real enemies, the guards, so they attack one another. Two white prisoners of the Aryan Brotherhood concocted a scheme to murder a black prisoner. The intended victim was a nasty, aggressive man, disliked by many members of the staff and prisoners alike. Somehow, the straps anchoring down the bottoms of the fencing got opened. Working together, the Aryans yanked up the bottom edge of the fencing.