Not all parents get into the affair...I did not put every boyfriend into court view..
When was the last time you dated and did you run a background check on all your dates or your daughters boyfriends or did you just take them on their word.., most people do this.
She may have made a mistake, but she certainly did not deserve to die for for that misjudgment...everyone has some sort of responsibility, but the expectation is that we can survive the breakup, if it goes that way. he did not give her that right...that trumps the "she should have known argument".
If he had just stopped at light abuse ,she might have had a choice. As it is she did not, he took her life..
You still miss the point and who really should have been made accountable..