I believe anyone convicted of a serious crime should be used for their body parts,give someone else a chance at life.
Eye for an eye. Commit a crime. ( murder, rape, child mollest etc. ) You get a short trial and only outcome is loss of limb or death right there and then! Puts fear into people and others think twice about what will happen when caught. No sitting in prison on tax dollars, eating , working out. Your in prison for a reason !!