Why do the villains always try to stymie the hero by threatening an innocent? Well, because it usually works! One of these days, I'd love for one hero to reply: "Look, as matters stand, you're going to prison but you'll be alive and mostly intact. Kill that person and I'll make it my business that you go to prison in a body cast and unlikely to be able to walk or talk ever again. Please make your decision now and understand that this is the last chance you get."
Meanwhile, I think that Scarlet has remembered an interesting effect that alcohol can have on ice.