And another point I thought from the beginning: What happens, if after all the investigation, and possibly even a trial for officer Darren Wilson, all the evidence, or even a jury, finds no evidence of racism or excessive force?

Do you think that any amount of proof and investigation that doesn't lynch Wilson will ever be acceptable for these people?
This mob of blacks is not interested in the facts or justice, and will just use any verdict to rationalize their victim-culture of "injustice", to continue looting and attacks on whites.

As has already been proven in the aftermath of the George Zimmerman verdict.
And the Rodney King verdict.
And in many other manufactured racial controversies by the likes of Al Sharpton and Jesse Jackson.