I don't think this quote especially applies to Denver or Aurora PD, and certainly not to Los Angeles, Baltimore, Chicago, New York City, Boston, or any other liberal big city police force.
Denver PD conducted a violent arrest of a symbolic, peaceful protestor, an image I will never forget nor forgive. It would have been enough for them to have one officer put his hand on the man's shoulder and announce, "I place you under arrest." But no, a bunch of officers jumped him, tackled him and, with knees to the neck and back, and in what might even have been a choke hold, put handcuffs in the most violent way possible. Despicable and unforgivable. The 98% who give the other 2% a bad name.
When did Denver pd violently take down a peaceful protester? What are the details?
Yep. Believe what they do, not what they say.