It was an unnecessary escalation. Putting your body in the way of a moving car, only to then use that as the reason to use deadly force should be against policy at any sane government organization.
They have the video, the car make, model, year, her face, and she doesn't strike me as evil genius. At the very worst, you let her go for $50 worth of fucking krogers and roll up on her later. He can now be charged with manslaughter and forced abortion. I get tired of saying it; fucking pigs!