he spends his free time tutoring other inmates like keno austin who's trying to earn his ged. >> what'sr? uh-uh. >> oh right. >> we're just here trying to offer critical thinking skills, conflict resolution, ways to resolve disputes without resorting to violence, just use the platform and credibility that we do have from our past lives to try to affect positive change in here and on the streets. >> you're doing good, man. you catch on quick, for real, for real. >> coming up, two cellmates with two unthinkable crimes. and later -- >> what have you seen so far? >> prison surveillance footage provides a new view as investigators try to figure out what happened to curtis cash and whether his cellmate should bear the blame. should bear the blame. . but, uh... what's up with your... partner? not again. limu that's your reflection. only pay for what you need. ♪ liberty, liberty, liberty, liberty ♪ you have power over pain, so the whole world looks different. the unbeatable strength of advil. what pain? steven could only imaginem 24hr to trenjoying a spicy taco.burn, now, his world explodes wit