Absolutely unless the camera showed Wilson executing brown and then Wilson wasn't prosecuted.
If the camera showed that Brown aggressively grabbed for the gun and hit Wilson for only telling Brown to "get off the street" then there would have been no riots.
People would have been talking about how stupid Brown was to behave that way.
at worst some would be upset that wilson kept shooting after Brown was down but the camera would have shown that was a matter of a couple seconds.
Cameras protect the police.
Cameras protect the public.
Cameras protect businesses and cities.
all police should have a camera. all police vehicles should have multiple cameras with wifi-uploaded backup that's resistant to tampering the officers involved.