A reasonable person must have believed they could get out of the way of the vehicle, of which the driver was not accused of any crime and was not acting belligerent, because his feet and legs were almost entirely to the side of the vehicle before he shot, and he continued shooting through the side window. If he has such a lack of awareness or emotional instability that his perception becomes so easily warped he should not be trusted in that role. Furthermore it only unfolded that quickly because of aggressive actions of the officers. They pulled directly up to the vehicle, trapped it with their bodies while she tried to comply with their order to leave, while also shouting conflicting orders in the first instant they got up to the victim.

And if we are looking at the full picture, what could their justification be for lieing about having medics or blocking medical aid for over ten minutes? Then once arriving, blocking the ambulance down the road. Actions after the fact attest to a person's state of mind when committing the act. Why wouldn't they comply with an investigation and stay on scene right away as well? I really doubt there is any official policy that you should flee the scene after you shoot someone in the face even in self defense.

How the encounter started is entirely relevant. How can it be self-defense when the officer purposely and needlessly put themselves in danger? If you base an analysis solely on what the shooter says they felt in the moment how can you have any sort of objective investigation into any shooting?