most big cities police departments have an internal affairs department. smaller departments have officers assigned to address citizen complaints.
is the reason this is because police departments know eventually their officers will run amuck. do they purposefully hire and train recruits that have no standards, no moral fiber, no knowledge of basic and fundamental human rights.
i once had an officer say to me " i appoligize for the fact that you feel that way" read that again. how can someone appoligize for how i feel. when i pointed out that what he said made no sense he insisted it did.
im not saying all police officers are bad. but when the police have to police the police something is wrong