1. Firing a shot in the air is reckless -- the bullet/round comes down with the same speed and momentum as when it was first fired, and it's gotta land somewher

1. Firing a shot in the air is reckless -- the bullet/round comes down with the same speed and momentum as when it was first fired, and it's gotta land somewhere -- and I'd be surprised if that was the standard operating procedure of any law enforcement agency in the world (however my surprise doesn't mean it isn't true). Perhaps you meant they fire a warning shot in the ground, but there is a big difference and that you missed the distinction suggests to me you may not have accurate information about what law enforcement agencies are or are not required to do. 2. As for the GP, you should neither shoot to kill nor shoot to maim. You should shot to stop the threat. Whether they live or die is not as important as stopping a lethal threat (and if there is no lethal threat, you should not be shooting). And if your intent is to stop the threat rather than kill or injure, the best chance of stopping the threat is to shoot center of mass until the target goes down. (Which will, in most cases, kill the target, incidentally)