he spends free time tutoring other inmates, likeaustin, trying to earn his ged. >> left. >> oh, yeah.st trying to offer critical thinking skills, conflict resolution, and a sign of disputes without violence, used a platform and we have past lives, and try to adjust to life in here and on the streets. >> doing good, man. man, you catch on quick, for reechl. >> coming up, two cell mates 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 cell mate should bear the blame. >>> at indiana's wabash valley correctional facility most of the inmates live in two-man cells and like any two people sharing close quarters, cleanliness is vital. >> why are you sweeping with your hands? >> i don't like using the broom that everybody else uses, i'm just bringing their funk into my cell. >> when do you think we're doing spring cleaning? >> it's not going to be today. i'm already cleaning the floor. >> that's fine. i was just asking. >> i will make tim