Oh boy what do we have here.........Show 'em your CHL badge.
If you have drawn on a perp/un-invited robber trespasser, hold them at gun point (hands on back of head and legs spread) and inform them that if they move you will treat that move as a threat to your life....! (only shoot them not the ground)
Inform 911 of your problem, describe yourself to them. And when the police get there, if its just one officer still hold your gun on the perp. If the officer drawns on you its just for his safety. If he requests you put your weapon down "Decline Politely" and tell him you will when the second officer arrives to cover the perp. He will understand your concerns, just dont have the gun pointed in his direction.