Coming from my past as a US Marine, here’s what I’d keep in mind. Always attempt to de-escalate prior to use of lethal…Unless imminent threat of death or dismemberment is present. Never draw or brandish your weapon until you’re ready to use it. It’s not a toy. Do not fire warning shots or try to shoot your target in non lethal areas. There’s non lethal weapons for that shit. Instead attempt to put the failure drills into the place. 2 to the chest 1 to the head or groin. This ensures the most humane use of lethal and also protects you at the same time because using this method will ALWAYS result in pretty close to instantaneous death.

She shouldn’t have trespassed and caused damage. How do you know she wasn’t going to enter the residence, find a weapon, and cause him or his family life threatening injuries. Was there o the way to handle it, maybe, but we weren’t there. Basic life needs are always to protect you and yours, if you threaten me and make an action, I too will see defend myself until I feel the threat is gone.