Just a thought, but seems like these protests would be a great opportunity to register a bunch of people. A town with a population that is 69% black could manage to elect a black mayor and appoint a black police chief and start to undo some of the institutional racism that seems to be happening there. Maybe I'm looking at this too simplisically and maybe the mayor in charge is a great guy who people of all races love and honor, but something obviously needs to change.
In fact any protest related to this and other shootings would be a great place to sign people up and show them their vote matters. If you are angry, you can stand here and scream and wave signs (and yes that's a good thing to do to draw attention to the problems you are protesting against) but if you don't back it up by voting and dragging every member of your family and friend list to the polls with you then it will all be for nothing come November.
If we vote, we win. People are always talking about how Dems don't turn out for midterms, well, this is a huge opportunity to show people WHY their vote matters. Protests are effective weapons, but voting is how you win the battle and ultimately the war...