[Tenhundfeld]

How do you know he's drawing on you with criminal intentions?

So, you had an experience where you perceived a cop's attitude to change. That's fine. Maybe next time the cop asks you to get out of the car. Maybe he says you match the description of a suspect and tries to handcuff you, confiscate your gun. At what point are you going to draw your gun and defend yourself? It's not like the very, very small percentage of cops who are "criminals" have some flashing sign to alert you. By the time you realize some shit is going down, it's going to be too late.

And who said anything about expecting mercy from a criminal? Do you know any cops? If not, you should make an effort to get to know some, at least the community officer assigned to your neighborhood, if that applies to your locale. Most are decent folks trying to do good. Most are not "criminals".