captain morgan completes the paperwork and then escorted him toward segregation. a 23-hour-a-day lockup unit for inmates who violate prison rules. >> i was taking him to north segregation to lock him up in our seg unit. >> when the inmate turns on him, morgan tightens his grip. but the situation would soon get much more intense. >> that's when he tried to pull away from me and turned around on me. >> he's grabbing on me. >> that's when i tried to secure him to the ground until i could get more security help. >> no, no, no. no, no, no. huh-uh. i'm going to walk. i'm going to walk.