I'm not unreasonably "**** the police" here, nor do I approve of their handling of this situation. I think this situation is godawful and the blame is hardly limited to any one group.
SPECIFICALLY ABOUT BROWN'S SHOOTING, though, we need more evidence.
Currently, the info we have is not enough to be conclusive, though CNN is currently noting that almost everyone commenting on the death online (and elsewhere) is using this autopsy report - which is explicitly inconclusive per the ME - and stating it confirms their suspicions.
Well, it doesn't. It doesn't confirm much aside from 6 shots, from the front, headshot was the kill shot, he was hit on the top of the head.
So either he was shot from above or he had his head bent down towards Wilson. If he were charging Wilson, that would be consistent with the known headshot.