[BitWielder1]

Why not go all the way? Force everyone to wear an RFID tag.
When you pull the trigger, the mandatory smart gun sends all the pertinent information, including audio, video and the ID of shooter and target, to the FBI where a clerk decides whether to allow the gun to fire or not.
It may take a few minutes but it's better than to take a human life unnecessarily, right?
Of course the perp's gun will have no such limitations.

[CrazyIvan]

I used to laugh at clever sarcasm like this. Lately I cringe and think don't give them any ideas!