Aaand: although the law of US crime movies clearly says that the bad guys must be shot and you’re still good if you do it, JJ has so far only used a knife, so … I’d try and keep him at gunpoint, call the police and have them arrest him because that’s how law in civilized countries work: You arrest the suspects, then try them and if they turn out to be criminals, you sentence them. Unless of course they’re rich criminals and their crimes were more on the financial side of things, in which case you let them go because that’s better for the economy.