It would help your narrative if the cops in Ferguson were actually worth defending. It turned out as demonstrated by the Department of Justice investigation that they were corrupt, and violating the Constitution. Regularly.
DOJ: Ferguson PD engaged in racially biased policing
This is the kind of policing they were involved in. Find an innocent man. Beat him to a bloody pulp, and then charge him with destruction of public property for bleeding on them.
The Day Ferguson Cops Were Caught in a Bloody Lie
So while the outrage over the shooting of Michael Brown may have been imperfect, the rage that led to the explosion of outrage had been building for years. Because those were the people who were enduring the racist policing. They were the victims of unconstitutional practices by the police. They were the ones being abused. Day in, day out.
If I was on the jury, the last person I would believe would be a cop from Ferguson.