Again, how does this, in any way, justify the shooting of an unarmed woman?
It doesn't matter why she was in the street, or how many cars needed to get past her.
It doesn't matter why her wife was filming.
It doesn't matter why she drove away instead of stopping.
All that matters is whether the shooting was lawful. It was not, therefore it was murder.
The way she drove away could be used by the defense as a mitigating factor; It should be utterly destroyed by the prosecution if it is, as she didn't drive in a way to cause danger to anyone, but it does have a slight relevance to the case.
The fact that she was in the road, or that her wife was filming, or why she was there in the first place, is completely irrelevant.