and forced stateville to undergo drastic reform. >>> coming up, a mass murderer's exploit at stateville sparked massive prison reform. that's next on "lockup." test test when you run a business, you can't settle for slow. that's why i always choose the fastest intern. the fastest printer. the fastest lunch. turkey club. the fastest pencil sharpener. the fastest elevator. the fastest speed dial. the fastest office plant. so why wouldn't i choose the fastest wifi? i would. switch to comcast business internet and get the fastest wifi included. comcast business. built for business. >>> you know, i regret what happened back during the past. but, i mean, everything happen for a reason. you know, it brought me here at a young age. it taught me a lot, opened my eyes a little bit more. so get out there and try to do what's right for my little son and everything. >> by the early 1990s stateville was one of the wildest and most violent prisons in the country. it was a tough place to be for both correctional officers and inmates. all of chicago's most powerful gangs flourished here, continuing the

every day he puts it right back on. >> the segregation unit at stateville correctional center. basically this is where the bad people who are being extra bad in the facility come to be locked up. they urinate, bowel movement everywhere. i think they just are kind crazy. the prison life is probably getting to them. >> we've never seen a more bizarre display of this gut-churning activity than a california state prison corco n corcoran. it happened during a routine shoot at the prison hospital. >> we were there for like about ten minutes, did a couple interviews with a couple doctors and initially it seemed like it was going to be mundane, going through the process. we decided to leave. we were all packed up, ready to go back into the other section of the prison when all hell broke loose. >> we have four inmates in four different cells that are holding food trays, some of them have started flooding the tier, which means they're causing the waters to back up and causing water to go out on to the floor. i'll first try to talk to the inmates and get them into complying with staff ins