In Police-State America, a "rogue cop" means being a peace officer - dedicating yourself to protecting people and their private property from aggression. Unfortunately, this is the exception, as a huge majority of cops are armed agents of the state's looting and oppressing.
Just ask Regina Tasca, a cop from New Jersey, who was fired for "bizarre and outlandish" behavior.
Her crime? Failure to properly beat a couple tax-victims to a pulp and intervening when a police officer from another jurisdiction viciously assaulted an emotionally damaged man. Thank you, Regina, for your honest and dedicatedservice to actually preserving the peace and protecting the public; it's no wonder you were fired.