Will we ever know?

 What I wanna know is which shot killed Ms Good.

The one through the windshield, or one of the two through the driver's side window?

Will we ever find out?

Probably for some people, it won't make a difference. She disobeyed an order. He thought he was in danger.

But the implication is obvious. If the kill shot came through the driver's side window, the officer was probably no longer facing an imminent threat, assuming there ever was one.

Had he not pulled the trigger , they would both be alive.