The U.S. Supreme Court ruled that cops have NO duty to protect the people who pay the taxes that pay their salaries. They also ruled police departments do not have to hire people who have above average intelligence. In other words, those most likely to be capable of assessing situations and making sound judgement calls, can be denied employment in favor of those of average to below average I.Q.s who are more likely to not question orders and just do 'their jobs'.
Most psychopaths start off by torturing and killing animals. It is argued that many psychopaths choose working as police officers as a means of acting out their tendencies without fear of consequences.
While I think most cops are certainly good people it only takes a few to terrorize a community. These are the donks that need to be weeded out. The people that already have an inborn need to control others and force their will on people.
Let the good cops do their job, train them well and pay them well. But the bad ones HAVE to be gotten rid of.