I don't much care what happens to most inmates but those with really long sentences should probably not be released early (or at all!) because they pose too much of a risk to the rest of us.
I have an even better proposal.
We'll just use you!
Are you going to give them cancer first too?
This is a horrifying proposal not only on the ethics front but also in the scientific uselessness of it.
This is exactly the type of thing that gave the Nazis the bad name they deserve.