I realize I have come late to this, but after the forced shut-down of Occupy Wall Street and Occupy Oakland, I was somewhat relieved to see that Norm Stamper - the former head of the Seattle Police Department - has spoken out against the heavy-handed tactics of some police forces in dealing with the Occupy Movement.
Stamper even admitted that during the infamous "Battle of Seattle" in 1999, the use of chemical agents was a mistake, and that his actions had interfered with the legitimate democratic rights of protesters.
Check out his book: Breaking Rank: A Top Cop's Expose of the Dark Side of American Policing.
In a November 17, 2011 Democracy Now interview, the former police chief states: "There are many compassionate, decent, competent police officers who do a terrific job day in and day out. There are other who are "bad apples." What they both have in common is that they "occupy" as it were, a system, a structure that itself is rotten. And I am talking about the paramilitary bureaucracy."
See the whole interview with Amy Goodman and others here.