And what about those that were innocent but executed.
Every precaution has to be taken to ensure this doesn't happen or at the very least is kept to a minimum. Possibly any one "found" guilty of a single crime should be exempt from the death penalty, doing that will at least ensure that anyone who does undergo the death penalty will at least be guilty of some heinous crime even if not the one they were sentenced for. Life is a risk, Innocent people die in every walk of life.