And that's already been done, for anyone paying attention. But the people pushing the BLM narrative have no intention of understanding what is actually going on. You fail to realize that you've swallowed their narrative whole by even acknowledging that there might be a problem with homicidal maniac racist cops.
The violent crime disparities between whites and blacks are well documented. In 2015 there were 987 fatal police shootings in the USA. Blacks made up 26% of those shootings. Of those, 36 "unarmed" black males were shot, though "unarmed" includes those who went for the officer's gun, were beating a cop with his own equipment, the results of accidental discharge during a struggle, and a bystander.
If BLM and co. actually had a legitimate gripe with cops, you would know about the white guy in Tuscaloosa, Alabama who came at a cop with a !@#$ing spoon and was tazed and then shot. But that doesn't suit the narrative. So guys like Michael Brown (who clearly attempted to take an officer's weapon - an immediate deadly force response was needed) become household names because it's convenient for the narrative.