You picked one, out of many questionable acts. Every other instance you haven't even been willing to entertain that an officer was in the wrong.
You want to focus on the specifics of Michael Brown and Trayvon Martin, but do not want to see the bigger picture surrounding those incidents.
FTR, I think that the shooting of Michael Brown was justified, just to put that out there. The bigger issue in Ferguson, is the findings of the DOJ reports. The law enforcement system has/had huge flaws that caused the people of Ferguson to be mistrustful of the police in the 1st place. People will never trust the truth of the Michael Brown incident because they see the police there as corrupt and racially biased based on thousands of things that happened prior to the death of Michael Brown.
It is clear that Trayvon Martin was not killed by the police. The issue with the Trayvon Martin case was the entire incident and response to the death of Trayvon Martin. He was an unarmed, black teenager walking home from a store who 1 bigot thought didn't belong in his neighborhood. The law enforcement community automatically accepted Zimmerman's account, even though it was clear that Zimmerman initiated an altercation with him. Trayvon Martin is an excellent example of systemic racism. He was deemed suspicious and approached and ultimately killed by a man for nothing more than being black. Then, after he was killed he was vilified. Every transgression of his life was aired in an attempt to make it seem like he deserved to be killed.
Again you missed what I wrote about Ferguson, Missouri. The short version is I live near NYC. I have lived near there my whole life that included the 1970s, 1980s and 1990s. You didn't go into Times Square after nine in the evening, and you didn't go into Central Park after dark. The Police and the Black community had very bad relations. Al Sharpton kept coming with the slogan "no justice, no peace". Sound familiar. After many years and many negotiations it was worked out. I wrote that Ferguson Missouri today was like NYC in those times that I mentioned. They have to find a way to work it out. I never said that the DOJ report was wrong.
Read what JIMMIA had to write about Trayvon Martin. Seems like you missed that also.