I was 100% on the side of the mom. Then I read that she shot the man after he had left the house.
She’ll need a good lawyer here.
Yeah, if the 20yo had been in the house uninvited and she plugged him, she would be fine. That he was invited there by her daughter, and that she shot him outside, as he was trying to get away ... aren’t going to help her. You can’t argue that someone doing their best to get away from you is an imminent threat your life or health.