>> That is not in the realm of the self-defense rights I fight for.
Except an intrusion can alter the homeowner’s state of mind.
Be careful about how you apply compassion.
I am not applying compassion. I am applying the law as I understand it. If these two had been shot dead during the attack, I would applaud it as highly justifiable. However, under the law, lethal self-defense is allowable when there is an offensive threat to one's life or well-being - including a perceived threat, which implies either a weapon in hand or a threatening approach. Until I see she had a weapon, that was not the case. And she was on the ground, wounded so I don't see how she could have been advancing in a threatening manner.
She had already taken the step of fleeing the scene, and in many states that is not a justifiable shooting. But this went further, she was hit while fleeing and on the ground. At that point he should have backed away a few steps, held her at gunpoint and waited for the cops to arrive.