Your question is not valid when a car is coming right at you and will kill you. You protect yourself every time your life is at risk. Don't worry about details. Dead is dead.
Sounds to me like self-defense on the part of the woman, or that cop sure better have a really sound reason for firing a warning shot ~ which he doesn't.
It's pretty obvious this is a bad cop doing a hit for gambling interests UNLESS he can prove otherwise, and I don't think he can.
Yep. That's why the 'warning shot' makes no sense. If you have time to fire a warning shot, your life isn't in danger...
Think about it.