On the facts you just told me, I would give the cop the benefit of the doubt. Surrender the badge. If the victim caused the circumstances that cause the cop to reach for her taser, he deserves some of the blame.
Obviously, he did not deserve to lose his life but I wouldn't let him off the hook if he was being a dumb@$$. But I did not read all the facts on this case.
I’ll have to look into this some more. The brief reports I’ve seen suggest she should have used the Taser instead of the handgun. That line of logic doesn’t make sense to me if the cop is under attack. If the suspect wasn’t being cooperative and not an active threat to her life, she should have called for a backup.