If all the clips from this video are real, it's a pretty messed up situation:
http://www.liveleak.com/view?i=e25_1408413667
And even if not all them are, this has gone too far. Looting and rioting is not necessary, all these people are just using it the situation as an excuse. Cops "mistakenly" kill innocent and not so innocent people all the time, but god forbids that person happens to be black because all hell breaks loose...
Last year a local college student was wrongfully shot and killed by a campus police officer. He was white. And guess what? Yupp, no rioting nor looting.
They need to be stopped, and they are asking for more force.