...in the alternative, a person could believe that Brown bent over to speak into the vehicle, allowing Wilson to grab him.
Oh come on.

Do you REALLY believe a kid that just robbed a store, and getting told to get out of the street is going to do that?
Come on man. You really think Brown is going to lean into an Officer's patrol car like some Bikini Barrista?
How often have you spoken to someone in the driver's seat of a car while you were standing straight up?
All the time.
For any shot that hit Brown, the forensic evidence would show which way Brown was facing. However, for any shot that missed Brown, the forensic evidence would not indicate which way Brown was facing. So the fact that the forensic evidence does not suggest that shots were fired at a fleeing Brown proves nothing. Plenty of witnesses testified that shots were fired at Brown as he ran away.
And plenty of witnesses said the exact opposite. You do know that several witnesses that originally testified that Brown was trying to surrender recanted their story before the Grand Jury, right?
Not to mention the fact that in general its human nature to run like hell when shots get fired - but you would have us believe that Brown, upon hearing shots, stopped, turned around, and then charged Wilson?
Again, that's pretty far fetched.
There are witnesses who said Brown charged; there are other who said Brown moved in Wilson's direct. What bearing does this have on whether Wilson was illegally shooting at Brown as he ran away?
None, since there is zero substantial evidence to suggest Wilson did any such thing.
A charging person can close 22 feet with another person pretty darn quickly, even if the person being charged is back peddling. This was not a panicked back peddling, nor was this panicked shooting, as shown by the fact that Wilson hit Brown six times. And remember, somewhere in there is a three-second gap, which Wilson never mentioned.
Wilson is also a police officer who is specifically trained to react in a situation like that. If he exited his patrol car with pistol drawn, he could easily, very easily, fire 8 shots in the time it takes a person to move 30 feet with a semi-automatic pistol.
Even for an untrained person with a gun holstered, minimum safe distance is about 21 feet. That means even an untrained person should be able to draw a weapon and fire it to hit someone outside of 21 feet from them or so. They actually did a myth busters on this once. Pretty informative.
I find your claim that 'the physics doesn't add up' to be unsubstantiated.
hmm... I thought Wilson fired 2 in the suv and another 10 afterward... Did Wilson fire twice before Brown charged him? The two volleys separated by a gap were as Brown charged but if they only account for 8 shots then that leaves 2 shots.
I thought it was 2 in the car, 8 afterward for a total of 10 shots, 6 of which hit. In order to believe the claim that Wilson shot at Brown while running, Brown would have had to instantly turned around after the first 2 shots of the first 4 shot volley, then getting hit with the last 2 shots of that volley THEN commenced to charge Brown at speed.
Ummmm. Not likely.