One thing. Why the fuck is it a shitstorm whenever a white cop shoots a black guy? Second thing. From what I've heard. Apparently Michael Brown was coming at the cop but that's just what I've heard.
Heavy racism followed from both black and white. It didn't help that Wilson's followers were mostly Whites and Michael's Black. The jury also consisted of 9 Whites and 3 Blacks.
An opposite O.J. Simpson case.
If you look at the autopsy he was shot first in the shoulder twice. Mike probably knew this and knew he was about to die. This could be the reason he attacked Wilson.