I think the death penalty should be enforced quickly, not many years after the fact. Quick justice, quick retribution, while the grief and pain are still fresh in everyone's minds, is the only way to make the death penalty a just, effective deterrent.
Does this man have the same thoughts as the one who committed the crimes? At this point we've given him time to reflect, time to regret, time to understand the terrible consequences of his actions. He's shown a different direction as a human being. Are we executing the same person?
I sure wouldn't want to be an executioner. What if it's wrong?