Again, intent and lack of knowledge, is a relevant factor.
I disagree. The circumstances of the shooting is the relevant factor. Had she been walking down the hall and dropped her gun which then went off and the bullet went through the wall and killed him, that would be an accident. She shot an unarmed man in his own apartment which she illegally entered. And it was her illegal act led to her shooting a man.
You keep comparing this to an auto accident where someone is killed and nobody is charged. And you're right, that happens every day. But if I'm fleeing the police and hit a car and kill the occupant, I'm getting charged. If I drink to excess and hit a car and kill the occupant, I'm getting charged. Even though in neither case did I intend to kill anyone, I was in the process of committing an illegal act that lead to the death. Do that and you're going to get charged every time. And that's what happened here.