So, If I come across a rapist engaged in a rape and I shoot him, he is a victim and I am a murderer, correct?
His actions make him in no way responsible for his own death, that's what you are saying.
This victim was not engaged in a crime herself. You are talking about an entirely different situation that has no bearing whatsoever in this crime.
What a ridiculous argument you make. This girl was not murdered by a hero. She was (as the evidence is presented to this juncture) murdered by someone she knew -- as are most murder victims.
How many women did Ted Bundy charm to death? Are those women dead because their mommies were screw ups?
Why are you so afraid to be realistic about such things?