Oh you silly goose. Of course you don't know what that person's intent is on the other side of the door, but why assume the worst when maybe, just maybe, they might be in need of help for knocking on your door so late. On one hand you make sense by saying that we don't know all the facts yet, but on the other you're saying that she should have stayed in the car when you don't know how badly she was injured. You say that you shouldn't go around knocking on doors unless it's life or death. It could be that she was bleeding out. It could be that she was experiencing major brain pain to the point where she had to get help to alleviate it. It certainly could have been life or death that lead to her knocking on that door.
And the point still stands that you should call the cops if you feel your life is in danger, AND if you have time. In the time that it took him to open his door and shoot her he could have called the cops by then. Just because you're scared doesn't mean that you can't call the cops. This is coming from a person with a natural fear and distrust of cops, but even then I'd call their ass in a situation like this before opening my door and firing any bullets. Hell, why open your door if you feel like you're in danger at all? If he was that scared he should have gotten to a safe place in his home, made sure anyone else in the house was in that place, and then called the cops before stepping outside and shooting her when she was walking away.
