i used to jump in the johnnie jumpups, and it stuck with me my whole life. and i've got some other nicknames. do you want to know them? some people call me b, just a regular b, because like a bee, a swarm of bees. and some people call me as snaps because i click when they get not too far away from me. >> corcoran security housing unit, or cshu, is the largest in the state of california. and holds the worst of the worst inmates. robert glen is no exception. though ironically, his prison history all began with one nonviolent crime. >> i came to prison for grand theft auto, i got sentenced to three years. >> but instead of simply doing his time and going home, robert has assaulted more than a dozen inmates, lengthening his original sentence. >> because of all of them assaults, my points again rose to a level four inmate. and the classification committee decided to give me a indeterminant cshu term, and put me up with a aryan brotherhood member, and that began my life as a prison gang. >> the aryan brotherhood used robert to carry out their dirty work. >> prison