. >> joe carr is serving an eight-year sentence for robbery. he is taking antipsychotic medication and under staff supervision, he agreed to tell us his story. >> i was anti-sociable. i didn't want to be around nobody. i didn't want nobody around me. i wanted to be by myself. everything made my angry. i would take a lot of it out of myself and then i would feel better. i was cutting myself up every day, every day, every day. so they ended up putting me in the shu for hurting myself. and then my time was up in the shu and then they put me back into the general population, and then i'm going right downhill all over again. >> after moving back and forth between the shu and general population, joe was eventually diagnosed as bipolar and moved to the residential treatment unit, or rtu. through counseling and medication, the rtu's ultimate goal is to integrate these inmates into general population. dennis profitt is one of the psychologists who works in the unit. >> the rtu program is set up on a three-phase system. the initial phase is set up to rec