This psychosis of the "black community" psyche is fascinating and utterly ridiculous. No amount of medical and forensic evidence can trump the ONLY piece of evidence they need--Michael Brown was black, therefore Wilson needs to go to prison. Period.
And we're the racists?
Whether the original offense was accidental or deliberate, murder or self-defense does not matter. There must be a very large tit for each tat. That is the lex talionis of old. A major step to Civilization is the substitution of Law for Vengeance with the government assuming the duty of punishment for infraction and circumstance, rather than relationship, determining what and whether the punishment.
Subcultures that have regressed to tribalism may still accept the concept of that government substitution but also insist on retaliation for offense rather than punishment for crime. If someone damages a member of the tribe then it is the government's duty to retaliate, no matter what the original circumstance.