No matter when/where you use it, expect your firearm to be held, as evidence, until case is closed. This is from my neighbor, who is a NMSP officer. That is why I use an inexpensive Mossy 500 for home defense. Another thing he told me is to never, ever shoot for the head, as this means you meant to kill. Emptying the mag into the torso means you meant to stop the assailant.