An interesting question, and one that deserves some careful thought.
I had the dubious honor of talking to Henry Lee Lucas for about 45 minutes before he was arrested (I worked at the motel he was living in) I had no idea what he’d done but something about that guy literally made my skin crawl.
I have thought about it a lot since then. Yes, I would, provided there was no doubt about guilt, be part of a firing squad.