Meanwhile there have been legitimate incidents of police brutality and misconduct which seem to have gone unnoticed by media and protesters. I saw a case a while back of a couple officers who pulled over a teen for something, pulled him out of the car and started to smash his head against the pavement for no apparent reason. The officers WERE CHARGED with conspiracy and punished if I recall correctly. Where is the outrage over that? Instead all the outrage seems to be centered around a rather ambiguous case like that of Michael Brown.
You won't hear about cases like that in the media because it doesn't suit the agenda they are trying to push. The fact that the officers in the incident you describe were both charged and punished flies in the face of the claim currently being touted in the media that police never face consequences for any wrongdoing they may commit.