the band indicates what color the door that you walk in. it's a controlled environment, a structured environment. >> people feel a lot more comfortable now. you don't have guys that sleep with their knifes as much now. but i attribute that to staff. i attribute it to some of the control factors that have been put in. i attribute it to the overall culture of the facility changing. >> once a week warden culliver walks the tiers of ad-seg, acting as a sounding board for these men locked up 23 hours a day. >> thought you liked lockup. you don't like lockup? why you keep coming back? >> i'm pretty much a straight-up guy. if that kind of steps on your toes a little bit, that's not what my intent it. but i need to give to it you straight. >> your mouth. you're going to have to learn how to control that. if you're ever going to make it. >> we deal with people. that's what we do. it takes a hell of a person to deal with people that no other citizens want to be bothered with, to be able to walk among these people day in and day out,