. >> ernest rogers has bipolar disorder. he's serve an 85-year sentence for robbery and attempted murder. >> i just lost it. i wasn't on my meds or nothing. the judge said due to my mental illness, you know, he said although i didn't kill anybody, i -- it wasn't from the lack of effort. >> despite the violence of their crimes, stone insists on treating all of the inmates in echo mod with respect. >> i've worked with mentally ill people for the last 35 years and i've never been injured, never been attacked. so i'm just comfortable with it. >> but even the most vigilant staff cannot prevent violence from erupting. >> there's only been one murder in this prison. it's been in this mod. it was in cell 13 downstairs. a guy strangled a guy to death. >> on august 22nd, 2004, carl ables earned the infamous distinction of being the only spring creek inmate to kill another prisoner. >> put a cellie in with me, the guy was doing life, in for homicide for killing his mom. which is disgusting. but this mental illness thing. he got 39 year