@brihard
I know it's a big ask and completely understood if it's a no go, but would you be willing to articulate a fact set where you as the investigating officer would be professionally comfortable not recommending/ charging a home owner for use of a firearm in a home invasion?
Sure. Hypothetical: Two adults and two kids asleep at home. 3 am, adult with their PAL hears the door getting smashed in. Adult accesses a lawfully owned and stored shotgun from a safe in the bedroom closet, loads it up and chambers a shell. Adult steps out into the hallway between their door and the neighbouring kids’ room adult hears movement down the hallway and yells “get out, I’m calling police!” Instead of getting out, intruder comes down the hallway and the adult sees the intruder holding a knife. Adult sees said knife-armed intruder coming at them. Adult is the only thing between armed intruder and the rest of the family, and has no realistic ability to retreat. Armed intruder can realistically be feared as a threat to the lives and safety of the family. Adult puts a shell’s worth of 00 buck into the intruder to stop the imminent threat. The adult assesses that the armed intruder is no longer coming at them in a way that presents a threat, they continue to cover the intruder with the shotgun while waiting for police, and they ground arms and keep their hands out and visible when police arrive.
It’s super bare bones, but in a situation like that I could absolutely see a fact pattern where we could comfortably not charge the homeowner. Now, there’s gonna be a search warrant, attempt at statements etc- the smart money is for the resident to lawyer up and maybe submit a written statement to police to articulate that perceived threat of imminent death or grievous harm; self defence is an affirmative defence that you pretty much have to claim on your own behalf. If we show up and we’re looking at some dude laying on the floor whose innards are now his outtards, and we don’t have someone telling us what happened so we can form a reasonable belief that it was self defence, well, in that absence of a story we’re investigating discharge firearm with intent, and some version of a homicide offence. Someone who defends themselves will have to tell police or the courts that they were defending themselves. Probably the first source for that info will be from 911 dispatch audio, but more info that that will be needed.
Good chance that in such a hypothetical the resident will be getting arrested at least initially. An arrest doesn’t mean they must be charged.
All that said I’ve never had that call for real. That’s just my take from having thought about it over the years, either as a responding officer (which given what I do now I likely won’t be), or as someone who finds themselves in that position.