Unless they're a cop, but only a good cop, not a bad one there to take your guns. I dunno. The whole thing is logically inconsistent, surprise surprise.
The logic is: cops have authority of the state/monopoly on justified violence, listen to them. If cops aren't there, you have the right to exercise lethal force to protect yourself, thus undermining the monopoly of force that the state supposedly holds. Ok, fine, that's understandable. BUT, after you utilize lethal force, if anyone not the state tries to stop you, you can exercise lethal force again until the state, the only other actor apparently who can use justifiable violence, comes in to extract 'justice'. So basically if you beat others to the "fear for my life" punch, you can kill to your heart's desire until the state shows up, because anyone trying to disarm or neutralize you in any way can be seen as a threat to your life or safety, regardless of your actions which may have threatened others! Or the violence spirals as your actions make innumerable others fear for their life or safety and the cycle perpetuates itself again and again.
Of course this only really can work if you're white and allegedly in defense of petty capital.