to investigate. >> while i was walking compton back up to the dorm, he was threatened. his life was threatened. so i'm looking for the guy who threatened when i locked him up. i know he was short. a white guy with a blue cap on. i'm almost sure i know who it is. as soon as i see him i'll know exactly who it is. hey, come here. >> what did i do? >> why don't we step in the v.l. for a second? >> i ain't done nothing. >> the inmate is identified as richard canada. his name was on some of the money order receipts turned in by compton's mother. >> turn around and cuff up. >> for what? >> because i said so. >> are you serious? >> yeah, i'm serious. turn around and cuff up. let's go. you're going to your cell. and you're key locked. >> for what? >> you know exactly what. >> no, i don't. what are you talking about? >> even though canada claims to not know why sergeant tibbles has detained him, he soon lets slip to another inmate that he does know. >> this is because of compton's