Your moronic generalizations aside, I will acknowledge this - I've seen little, if any, acknowledgement by my various instructors that, in a country where the 2nd Amendment exists, the presence of a firearm, in and of itself, does not constitute a threat.
That said, common sense could have ruled the day in this story. If you're a civilian, your gun is for your safety and the safety of your loved ones. Don't be a hero, and do what uniforms and badges tell you to do. This was practically beat into us at academy.