Every person on the planet lives next door to someone who could kill them under the right (wrong) circumstances.
neighbor lives next door to a dangerous person who owns and carries firearms. I wonder if he's posting on the MMA forums right now...
If you are attacked and use your firearm to defend yourself, you must be able to articulate why you reasonably believed your life was in danger -- and how you had no other way to avoid that danger
-- at the very moment you pull the trigger.
Closed, because this isn't going anywhere useful.