them. that meaning the mexican mafia. >> christian knight was probably one of the most engaging inmates i've ever encountered doing "lockup." he was very articulate, very well-read, very well-spoken and quite proud of his career as a criminal. >> i gave my a game. i would do it to the extreme violence-wise, selling dope-wise. >> in the lockup extended stay episode in which knight originally appeared, he gave shocking details of what he meant by extreme violence in describing his l.a. county jail murder. we warn you, the following is very graphic. >> and i walk up to him, hook his leg, go over a bare naked choke hold, bring him down. i throw in my hooks and choke him out. and snap his neck. when his neck snapped you feel it right against here pop, snap. and i pulled out my piece, stabbed him in the neck, let him have it in the chest. and he started making noises.