OBL? Nail his sorry ass to the ground, have doctors support him to keep him alive, and skin him slowly - starting at the feet, so you don't risk major organs - with a belt sander and 60-grit paper. Let the skin grow back, and repeat. Oh, and put hose-clamps on all of his fingers and toes - to be tightened once a day or so 'til the gangrene sets in. Do this indefinitely 'til he dies on his own.
Nothing we can do to him is bad enough. I really want this bastard dead, and not by a bomb - hold his head up to every camera within range to no one has any doubt.