You tell an officer that and you'll be arrested shortly after.
Lets check with Sean Hannity and see what he has to say on the issue....
Sean Hannity: I'd like to welcome Mr Rightwinger. I like that name by the way
Rightwinger: Thank you Mr Hannity and I'd like to personally thank you for defending the rights of "real" Americans
Hannity: And you sir, are a "Real" American <salutes>, so tell us about the shooting
RW: Well, sir...It was a dark and rainy night, I was alone in my store when suddenly, this big scary dude came in carrying a shotgun
Hannity: Was he black?
RW: No, but I think he was Liberal, he looked like an Obama voter
Hannity: <nods and smiles knowingly>
RW: So I kept my eye on the guy while I quietly caressed my Glock
Hannity: Glock? Good choice
RW: So the guy paces around my store like a beast getting ready to pounce. I silently released the safety on my trusty Glock , when suddenly, they guy spins with a menacing glare in his eyes
Hannity: You did say he was an Obama voter didn't you?
RW: I jumped up and fired a shot right between the eyes. He was still twitching so I fired seven more shots into him
Hannity: Well you can't be too safe...you never know with those animals. What did you do next?
RW: Well, it was 9 PM so I turned on Maddo.....I mean Megyn Kelly, while I waited for the cops
Hannity: Well thank you Mr Rightwinger, and I do so like that name. You sir are a great American Patriot and I thank you
What Jury would ever convict me?