on the west bank of the mississippi river is one of the oldest prisons in the country, iowa state penitentiary. there is a separate facility at iowa state penitentiary called ccu, the inmates who are considered mentally ill are housed here. lieutenant john fedler oversees the correctional staff at ccu. >> the staff have been through specialized training to be able to deal with the mentally ill inmates. >> up to 200 men can be housed in ccu. most of them reside in single cells in one of the four general population pods. >> i am here for depression. i was out on work release. i escaped from a work release center because i couldn't find a job. i robbed a bank in my hometown where the work release center was. i got in a high-speed chase with state troopers of missouri and local law enforcement. i hit one of the state troopers head-on, trying to commit suicide. and i killed the state trooper. i got 20 years fed, and 5 years for escape. i got a detainer in missouri for -- >> open 11. 22-year-old caleb etter's physical appearance is a testimony to his many crimes, beginning with an addiction to metha

. >> so the hospices, like the one at the iowa state penitentiary help the prisoners in their final days. >> well, i mean, for the most part the prisoners, most prisoners die in their cells by themselves, in an infirmary by themselves as well, or in a state hospital, shackled to a bed with a guard outside the door, with no visitors can come. the prison hospice at the iowa state penitentiary allows the prisoner to die with family around and friends from the prison. >> research shows, as you said one out of every 5 prisoners is elderly or expected to die in the cells alone over the next decade. what impact do you think this hospice will have on the prisoners turned patients? >> i think the truth is we are not going to have - it will not be used, rarely is it used now. medical parole is rarely used. the hospice program is the next best thing for the prisoners destined to die behind bars. the benefit of the program is that this particular program in iowa trains the inmate to be a volunteer, and they can help their buddy go through the dying process. that is comfort care, palliative care. and

. >> anamosa state penitentiary is a maximum security facility located in eastern iowa. home of some of the state's most violent offenders. one would think that the overcrowded conditions would lead to a constant barrage of bloody confrontations. well, think again. behind the walls of anamosa is a world of unusual contrast. >> to the security office. >> for new inmates arriving at anamosa state penitentiary, the very look of the prison can be intimidating. more than 100 years old, it was built entirely of limestone from nearby quarries. over the years, as the criminal population increased, so did the size of the prison. today, some 1,300 inmates live behind the massive 35-foot-walls and, like any prison, the threat of danger is everywhere. >> around our perimeter we have seven gun towers. they're manned throughout the day. >> the danger is there each time you walk through that gate, you know. you don't know what's going to happen from the time you get on shift to the time you get off shift. >> there's only two types of people in prison. you got the predators and you got t

. >> our visit to the anamosa state penitentiary in iowa led us to another memorable pair of siblingsove, whose lifelong allegiance drove them to kill. >> growing up i wanted to be him, you know. he's almost four years older than me. i see him running around drinking, breaking into stuff and doing whatever he's doing, i'm like, i want to be like him. that's my big brother. that's my idol. so i kind of followed in the same footsteps. >> but as the love brothers revealed to our crew, those footsteps led down a bloody path that ended at a holiday party in their trailer park. >> it was christmas night 1992. me and my brother went to a party with what we thought were friends, but they tried to rob us, take the liquor that we brought. >> they started beating me up, four of them. >> they hurt brad. i couldn't let them get away with that. they threatened his life. and i just couldn't handle that. so we left, went to my trailer. i got a shotgun. my brother got a knife, a machete. we went back out there and did what we did. i remember mike standing there. he had the gun pointed at the door of t