No hard evidence at this point that I've heard of. MB's buddy DJ said that MB was hit at the car and that he (DJ) saw blood on MB at the car. But DJ hasn't proven himself to be a very reliable witness. There are also reports in the MSM attributed to unnamed sources that say that MB was hit by that first round. But we (the general public) haven't seen any records of the police investigation revealing blood or DNA in the car or any other hard evidence either way that MB was hit at the car.
If I understand the Baden autopsy report correctly, there was no stippling on the skin around any of the bullet wounds, which would indicate that none of them was fired from closer than about 1 or 2 feet. So there appears to be some evidence that MB was not hit by that round.
If only one shot was fired in the car, and if the stray bullet that was plucked from the building is from the round that was fired from within the car, I have my doubts that MB was hit by that round at the car. I doubt it could go that far after hitting MB. I've also seen reports attributed to unnamed sources that MB was injured at the car by the gun's slide, which is possible, IMO. I have a friend who had her thumbnail torn off by the slide when she wasn't holding the gun quite right. The slide is blown back with a whole lot of force. So even MB's blood is in the car that isn't necessarily proof that he was hit by a bullet in the car.
I'm not sure it really matters either way. The gunshot apparently resulted in MB breaking off the assault in the car and fleeing, thus saving OW from further assault in the car.
One scenario I've considered: the hand wound could be from a grazing bullet that could've grazed his forearm and perhaps his chest as well. Michael's right hand could have wrapped around the muzzle while he struggled with Darren for it.
These comments by the family attorney make me wonder.
D. PARKS: Let me explain to you a few things. Number one, you`re going to notice that there`s an injury to his hand. That particular injury probably came at a close range, you`re going to find out later. Second, when we talk about front to back -- front to back mainly...
GRACE: Whoa, whoa, whoa, whoa, whoa, wait! Let me...
D. PARKS: ... applies to two things...
GRACE: ... let me hear what you`re saying. You`re saying that the gunshot wound to his right hand is at close range, although the autopsy is saying no shots at close range.
D. PARKS: Well, let me explain it like this. It`s a big gash.
GRACE: What?
D. PARKS: It`s a big gash, so as you hear more about it, it`s a big gash on his hand.
GRACE: So it`s not -- are you telling me it`s not a gunshot?
D. PARKS: Now, how that`s -- no, it is a gunshot wound caused by the gun, but a bullet, but it`s a rather large gash in his hand.
GRACE: Well, why do you say it`s at close range?
D. PARKS: Secondly -- well, it`s pretty big and it`s pretty open.
GRACE: That doesn`t mean close range.
D. PARKS: Now, how and when it happened, I`ll leave that to the experts.
http://transcripts.cnn.com/TRANSCRIPTS/1408/18/ng.01.html