I agree. I think police departments have accreted a population of bullies and psychopaths in the same way the Catholic Church accreted a population of pedophiles, simply by protecting them and not weeding them out. Over time, people with an interest in exercising violence on others begin to recognize it as a career opportunity and are drawn to the job. Add to this the natural, creeping, negative influence of authority and entitlement on otherwise normal people; the relationship between the races and the classes and the overall criminal justice system; the value placed on property rights over human rights; the romanticization of violence; the devaluation of the treatment of mental illness and of the rehabilitation of people with criminal records; financial rewards for issuing citations, making arrests and incarcerating people; and the poor training of and support for police officers.