Dear God, no!

Simply consign them to oblivion, to history's oubliette. Why make martyrs out of them? Send W back to Crawford without benefits, make him work for a livng. Let Dicky do the same. Simply forget them, clean up their mess, and move on. Perhaps get a battalion of cats to bury them in sand....

And if you are going to apply a death sentence you owe it to your humanness to do it quickly and right. A long drop that snaps the spinal cord, a bullet in the "reptilian" brain stem -- but long, slow torture? Then you lower yourself to the same level.