What kind of example could a prosecutor set? The dumbass was beating her senseless(it apparently showed, hence the detectives agreed) and came after her through a locked door to continue his attack. Married or not you do not get to beat anyone to death.
In Washington state, if the prosecutor is trying to get re-elected by creating a drama trial and you prove self defense. The county pays your legal expenses and lost wages, it cools off the zealots considerably when they have consequences to their anti-gun actions. Locally, the over zealous prosecutors have lost cases to a 20y/o Marine who shot a guy outside a bar(the guy and his friends were beating the Marine), a biker who shot a rival biker( rival gang of 5 jumped the lone biker in a bar and were "stomping him to death" when for no reason he shot one of them) and my favorite a 24y/o armed man was attacked by a 19y/o multiple convicted felon and his girlfriend after he took offense to them throwing beer bottles out of there car at him. The 24y/o warned them he was armed and asked them to leave him alone, they bum rushed him and began beating him, he drew and fired one shot killing the scumbag. All in front of a retired Police Capt. The retired officer politely disarmed him and held all parties till help arrived. 19y/o scumbag had crack, marijuania and .13 alcohol in him.
Our local prosecutors now looking closely at who they bother these days, local juries let people who use deadly force go 99percent of the time here.