Of course not all cops are bad. But the fact that people feel like they have to begin all condemnations of corrupt police with that preamble is a testament to just how many rotten law enforcement officers there are, and to the way that many of them take out their aggression on those who point out the obvious, all evidence of their atrocities be damned.
stop and frisk
BLACK AND BLUE: THE DUELING WAYS OF VIEWING COP BEHAVIOR IN BOSTON
In the blue view, Boston is the bright exemption when it comes to rampant bad behavior on the force, and police here typically respect the civil rights of residents.