Not only had the agitators been wishing for something like this (a dead kid) to happen, they REALLY needed it to happen in St. Louis. For the most part, St. Louis, the city, has generally been kind of out of the fray - it was more of a Ferguson things these past few weeks. NOW...it's a St. Louis thing....and these agitators are loving it.
They KNOW this was a prefectly good shoot. They are just using it (and have been waiting for it) to further the agenda.