himself. he is banging his head on the wall. he it finding instruments to cut himself. [ speaking spanish ] >> this arm here, that was the last one. that was the one that he pretty much opened it up. all these other cuts on his arms, he uses tattoos to cover them up. that's how long he has been doing that. >> staff say they're never quite sure who they're going to encounter when they deal with guerra. >> his personality changes. very frequently he can be one person that is singing. and, then, at the drop of a dime, he is mad. [ indiscernible ] >> he's told me in the past, we can give him the taser. we can give him the oc spray. we can give him whatever. if problems is what he wants.