I guess some would want a little wiggle room but for most, it is obvious the cops can do no wrong period.
The most disturbing thing about the whole incident is the police may have not been too far outside guidelines. The fact is, these guidelines have expanded to the point where cops have near carte blanche to bully, injure, shackle, intimidate, and just plain frighten the public. It is all done to "protect" the cops. That excuse covers just about any indignity they want to inflict on the public.
Most will not take advantage of the power, some will only when they are angry, but many simply look for the chance to be bully boys.
One more thing. I have noticed several people mention cops on steroids. At first I didn't realize what they were talking about. I began to think about it and it suddenly struck me, how many cops are into body building. I believe there is a link between these types and the conduct we are seeing more and more frequently.