Its changing because, imo, local PD/Govt has bungled it from beginning. Like I said before, the actual shooting will shake out. The reaction to lawful protest, assembly and how the media was treated.....way wrong on many fronts.
I'm beginning to think this less and less. The cop has already been convicted in the court of public opinion and the AGs office. The presence of Holder makes justice less likely, not more likely. Just imagine how disenfranchised the black community will feel if the officers actions are exonerated. There would be rioting and looting all over again in spite of the truth. We do know that this "good normal boy" had stole some cigars earlier in the day and roughed up a clerk. He was a physically intimidating individual. I still maintain that IDK what actually happened but the officer is convicted by this community already.
As far as the response to the protests, I'm kinda with you. On one hand if a crowd of thousands is angrily gathering in one of the roughest neighborhoods around, you're damn right I'm gonna show up with an AR and some mobile cover. On the other hand, rounding up the press is never going to go in your best interest.
I would bet that it was hard to distinguish protester from looter and rioter. Or the trouble makers probably used the demonstration as cover for their activity. All of this would make a chaotic situation even worse. So they responded by trying to break up the entire demonstration to gain some kind of control and restore order. It clearly backfired and brought more people to the party and opportunists flocked to get their free ****.