some of the most violent gang attacks have taken place here at california state prison corcoran's securitysing unit, or shu. we visited the shu's now vacant exercise yard, which has been the scene of some of the prison's most brutal violence. ♪ >> i can see why fights went on in that exercise yard. because it was literally like a cage. there was nowhere for you to go. and if you really wanted to take someone out, that was the place to do it. it's literally -- like the most extreme ultimate fighting thing you would see. >> correctional officers showed our cameras how they quell the violence with an arsenal of their own. one that includes nonlethal and lethal weaponry. >> get down! get down! >> the first rounds we fire are wood blocks. hopefully the hurt will make them stop. if we really have to escalate with our nonlethal options, we use what's called a scat round. which is really irritating. see those are a little bit louder, the smoke you see there, that's cn gas. it's no fun. it messes up your sight, makes you, you know, makes your snot roll. and of course, we have a lethal option. we ha

some of the most violent gang attacks have taken place here at california state prison corcoran's security unit, or shu. we visited the shu's now vacant exercise yard, which has been the scene of some of the prison's most brutal violence. ♪ >> i can see why fights went on in that exercise yard. because it was literally like a cage. there was nowhere for you to go. and if you really wanted to take someone out, that was the place to do it. it's literally -- like the most extreme ultimate fighting thing you would see. >> correctional officers showed our cameras how they quell the violence with an arsenal of their own. one that includes nonlethal and lethal weaponry. >> get down! get down! >> the first rounds we fire are wood blocks. hopefully the hurt will make them stop. if we really have to escalate with our nonlethal options, we use what's called a scat round. which is really irritating. see those are a little bit louder, the smoke you see there, that's cn gas. it's no fun. it messes up your sight, makes you, you know, makes your snot roll. and of course, we have a lethal option. we have a

respect and don't cross those boundaries, we get treated just like anybody else. >> at california state prison corcoranmet three inmates living openly as homosexuals at what is considered one of the toughest and most violent prisons in the state. >> okay. if you could just state and spell your name for us. >> regina maiden. well, actually, reginald maiden. r-e-g-i-n-a-l-d. m-a-i-d-e-n. >> in this raw interview footage the three men discuss the possibility of attack and how they would respond. >> it's not being attacked. it's just being like -- you know, the proper word is stalked, harassed, because of rejection. you know, a lot of people here can't deal with rejection, especially coming from a transsexual. >> a lot of other things people don't realize, we're men like them. we're feminine like them. >> don't forget. women do kill. >> a lot of us don't put up with that and a lot of guys know that and a lot of guys that don't, so you know, when the ones don't, they end up getting beat up. >> and it makes them look bad on the yard. so that's why a lot of people do give homosexuals respect sometimes. they d

>> this is california state prison, corcoran. a maximum security prison that has housed some of the nation's most infamous criminals including charles manson and the founder of the mexican mafia. despite its reputation, violence doesn't come naturally to everyone at corcoran. >> i don't see myself as being like many of the people here. what i saw the longer i was here is there really is a thin line between them and me. >> before he was an inmate, stefan parro was a librarian. >> i'm here basically because i'm an alcoholic and i've done a lot of drugs, too. drugs are part of my story. >> parro's drug use resulted in a six-year sentence for crimes including burglary. >> at that time i had been married not very long. my wife was pregnant. the fact i couldn't stop drinking and i couldn't stop using, it was difficult to deal with the shame and guilt of all that. >> parro and his wife eventually separated, but he landed in prison for breaking into her home and stealing her credit cards to pay for drugs. >> i readily admitted to it. that

but this one yard at california state prison corcoran that's supposed to be gang-free. >> it's callede sensitive needs yard, sny. it's where gang dropouts or sex offenders or high-risk inmates go for their own safety. but even here gangs can spring up, and we found one of the most unorthodox gangs. they call themselves gbg, the gay boy gangsters. >> it's a group of men that are gay, that are not transgender, and who are gay men who like men who do not want to be a woman. okay. that's it. we're pretty thick actually. we're pretty much respected. we don't get into fights. we don't get into that sort of thing, but we have a pretty good following. we're just a group of people that are gay and stand for our own. >> clement, who prefers to be called wicked, is serving 20 years for three counts of robbery. and he's not the only gay boy gangster on the sensitive needs yard at corcoran. nicolas turner, who goes by the name demon, told us the gbgs should not be taken lightly. >> we hurt anybody that -- inside the prison system, anybody that tries to forcefully take property or rape or in any wa

when we met christian knight, he was serving 79 years for murder at california state prison corcoran. >> just seeing christian the first time, you kind of knew he had some kind of story. very dramatic looking. you know, with all the tats and very intense. >> it turns out knight had several incredible stories but one involved his attempt to attack a sex offender at the los angeles county jail. >> got this freaking child molester on the tier. he's actually in the van talking about what he does. you know, i like to keep myself, hey, i don't lose my temper. keep myself calm, cool, and collective. that dude made me snap. i get in the van and i tell him, i'm going to rip the toilet off the wall. i'm going to bust through this frickin' glass. i'm going to drag it down the tier, and i'm going to bust through your glass and cut you up your [ muted ]. you're a dead man. yeah, yeah, yeah. then all you hear is steel bending. i got behind the toilet, pushed the toilet all the way back. long story short, i ripped the whole toilet off, wrapped my hands up with my socks, smashed through the glass. he

. ♪ >>> when we met brian at california state prison corcoran, we had a pretty good hunch that the originf his nickname would play a major part in his story. >> my nickname is lefty. never been called lefty, it's because i have one arm. at 18 i was the victim of a drunk driving accident when i was in the air force. >> the other thing that was significant about brian to me was he was the height of irony on a lot of levels. he was a good example as to why you don't want to take justice into your own hands. his crime was that of a vigilante. >> you know being a christian means you don't have to be scared of your past because your sins, no matter how ugly they are, and we have some ugly ones in this room -- >> he is an inmate preacher at the prison's chapel and can trace the ugliest of his sins to a bizarre series of events that began with the loss of his arm. >> after the air force medically retired me, i retired to little rock, arkansas, started selling clothes in the mall. all i thought about all day long was having one arm, being in the big city where i didn't know anybody, and i already

. >> duncan was serving 28 years for home invasion, kidnapping, and robbery at california state prison corcoran. it was the culmination of a criminal career that began at a very young age. >> i came from a good home. i can't say that i had a bad childhood. i just got mixed up with the wrong people. i started committing petty crimes when i was a kid because i actually did get strung out on heroin. my first shot was probably when i was 10 or 11 years old. >> duncan had spent most of his life incarcerated. in that time, he developed a reputation as an inmate to fear. >> these are some weapons that they say they discovered in a cell that i once occupied, allegedly. myself, personally, i'm a nice guy and i don't believe in violence. that's a damn lie. it was my responsibility on the yard to ensure that, one, our people were not harmed by another race. i took care of the drug debts if one of our people became delinquent in a drug debt to another race, it was my responsibility to either cover their drug debt or have them stabbed, in which case we would send one of ours to stab them. >> duncan's loyalt