We Need To Do This.....
First, we need to guarantee everyone thorough justice, complete with DNA testing, carbon-dating, psyche evaluations, whatever's necessary. And only after the complete, un-biased trial, and a mandatory appeal on convictions, should we then sentence the Defendant to death.
Then, instead of sending him to prison (the Hilton) for several years before the actual execution date, we need to send all condemned prisoners to a compound or reservation (ala Indian Reservation) setting. Make the compound totally self-sufficient. Stock it with cattle or livestock or other wild game. And let the men 'fend' for themselves. Provide absolutely no health care, no modern convieniences, no nothing, Let them live a 'spartan' life. We could go out in Utah somewhere and setup a 1,000 acre 'park'. Put an electrically-charged fence around it (ala Jurassic Park) and let 'em be. And once a year or so, go check to see who's alive and who's dead. And in addition to the livestock and other sources of food, be sure to import several other pedators. Wolves, tigers, lions, hyenas, etc. Basically what we'd do is setup a wildlife preserve in this country, like they have in Africa. And while it may cost several million to setup and get started, after that, it would virtually be cost-free, except for the monthly electric bill.
Put 'em out there, and leave 'em. No visitors, no tools, no nothing. Let 'em fend for themselves.