I hope that no rioting occurs, at all. But to argue that there can't be any element of bias involved, at least in the way that (perhaps) some urban police departments as a whole (even if ethnically diverse) are trained to deal with poorer members of society, is being disingenuous.
It seems like many police officers are eager to make the person they have have apprehended "pay" for their resistance, for running, and in general for their efforts in trying to elude capture. "You want to run? Well, we got you now, M-F-er, and you are going to regret that decision". Which from the point of view of the officer is a pretty common human emotion-driven mindset, but one that has to be set aside as much as possible. The devil may be in the details- was a tough guy, make-them-pay mentality on the part of officers rewarded and fostered in the training of this policing unit?