. >> michael pitts campbell has worked at pelican bay since 1988.he has spent the past five years manning one of the shu's control booths. what have we got right now? 43 inmates. in here i'm responsible for keeping them protected from one another. i'm responsible for keeping the staff protected from the inmates. if i open the wrong door at the wrong time, staff or inmates can be injured and that is -- becomes all my fault. i cannot blame anybody else. >> to prevent bloodshed, gang activity must be strictly monitored and documented by every correctional officer at pelican bay. one of the most notorious inmates serving time in the shu is raul leon, a reputed leader of the mexican mafia. >> whatever it is lockup, the violence or the madness to murder, that's just -- you grow up in that, so this prison has never affected me like that i don't think it ever will. i'm strong willed when it comes to that. >> leon has been locked up in the shu for more than 15 years. >> there is a lot of guys here that prison life is hard for them, period, and then to be stu