 It just has to be reasonably perceived as a deadly force threat. And we've seen the photos of this guy on the roof. He does not look like a tactical police officer, long hair, stringy, AR, on a rooftop by a president. I'm sorry, even if it turns out later, if you shot him and it turns out he was just some innocent person, he looks like someone who's about to take a shot at the president of the United States.