Well then one can reasonably determine from the parking lot photos and the photos of the cars, that Officer White fired into her car when it was behind him and moving away from him. Else we would see bullet holes in her rear glass or trunk and not 4 holes in her windshield. From the position that the cars ended up in, which you can see from the bright orange markings in the parking lot photos, she was in reverse, moving away from him, thus a retreating "threat" at best. Simple trigonometry will be able to show this as we know where the cars were, and the bullet holes in the windshield and where they landed can be plotted.
http://www.nbcsandiego.com/slideshow/news/15904630/detail.html
http://www.forcescience.org/articles/shotinback.pdf
http://www.forcescience.org/articles/tellingthetruth.pdf
http://www.forcescience.org/articles/tempestudy.pdf
Now I realize such things might be a bit over your head, but you'd do well to attempt to understand the research. :)