Remember this story from last year. Man entered a movie theater looking for his wife to kill her and met a woman deputy sheriff who was working security at the theater. Took her 4 shots at close range before she put his guy down.
9MM or 45 ACP or 22 LR, it doesn't matter much if you don't hit the magic spot and turn off the lights. It;s why some of us old timer coaches get crabby if the people carrying guns do not put in the trigger time. It's no guarantee but it sure ups the odds.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.