What are you talking about? Who mentioned stereotypes?
Ferguson will rebuild and continue to exist. The rioting in Watts and DC did not result in the disappearance of the neighborhoods which were affected by the rioting.
Michael Brown might have had a stereotype of white policemen, that white policemen might not respect his rights.
That could explain his behavior if you believe the policeman's story.
Or the police there might have a stereotype understanding of the black community in Ferguson , that there is an unreasoning and violent streak,would explain the police behavior in some respects.
So if stereotype is part of the problem , perhaps near the origin of the problem, how bad is it to reinforce the stereotype on the record and on the video screen?