Except the state could prosecute. The everyone is dead so I can't go to jail don't fly. People get charged all the time when the other person dies with no other witness. Detectives do have jobs and do them despite what people think. That ain't even getting started with people who get falsely convicted. I wouldn't roll the dice on a shot with what was shown. What happened after may very well call for a firearm to be used but idk what happened after