The Parole board. The eval would consist of a panel of judges or whatever, and his statements and behavior given upon his entry into the DOC, in addition to the mans behavior while incarcerated would be taken into account, as well as his general attitude. This should be a very strict eval., and I would suspect that not many would be released. This would in turn send a message to all people considering crime, that crime does not pay and they had better behave themselves.
It's actually very simple but is indeed a radical change of thinking to how things are now. My understanding is that most of the violent crime is perpetrated by repeat offenders. Once they are out of the loop, things would turn around.
I think it's scary because it intimates personal responsibility, an almost unheard of concept.