I was frozen in shock for ansecond, before deciding I should intervene, getting between my boss and the suspect "I... I get what you're going for there, but the problem with those threats is that you'll probably go through with then, and if he turns out to be innocent, then he won't be able to say anything to convince you to stop. If you're hungry, then i can get you something later, but right now, we don't have enough proof against him to make threats like that. I'm not positive about what I saw, so I can't let you do that to him" I shudder as i say this, but don't know what else i can do.