Read the story, he did not shoot the dad just to shoot him. He was helping the daughter and the dad and cousin started beating him, then he shot him while taking a beating.
What would you do in the same exact situation? Do not say you would not have hit her etc... the same scenario you are helping someone and two men start kicking and beating you.
I’ve been in a similar situation before, trying to help a good friend and having her drunk off his ass boyfriend and his drunk friend tear down my door.
I managed to call the cops, but that taught drunk boyfriend that I had a phone to steal. So the next night when he came home, he and his friend came at me when I was in my room. Told me that I was getting evicted and that I had to leave. I told him I wanted to talk to my landlady, his girlfriend, directly. I would accept nothing else.
He took that as provocation and attacked me. His friend joined in
Long story short, they trashed my phone, trashed my glasses, stole my keys to the house and my car, and tried to kill me for calling the cops on him the night before. I got out safely, managed to flag down a neighbour, it was 12pm at night. Called the cops. Cops came, but he took off quickly. I got my spares and waited for him outside. He came back about an hour later after joyriding with my car, went in. I followed in and watched him go out and talk to a friend just down the street.
He left my set and his set, so I went in and managed to lock him out. He ended up trying to break in and called the cops to get back in the house. The cops were waiting for him.
In the end I got everything back.
The key for me was not fighting back. Had I tried to fight back they would have called the cops and arrested me. I was able to protect myself and break the choke hold, but I also didn’t screw around.
The other key was being prepared, having a spare set, and having a plan to put into action. I had prepared a plan, and even thought I might have to use it that day, but as it was late, I’d settled in.
As for this situation - I would have said, hey, let’s call the ambulance and get help for the kid. I would have made a quick decision about whether it was helpful for me to be a LEO. If he’s off-duty cop, it’s probably not going to help you to tell the dude you are a LEO.