And the increased militarization of police in even small-town settings surely attracts a certain wannabe brown-shirt type. Just like recruits who are excited to join the military for the thrill of it, some are there for all the wrong reasons.
My senior year of high school i worked in a warehouse with a guy who was about to go to the police academy. When I asked him why he wanted to be a cop he said, and I quote, "so I can shoot n*****s." I have never forgotten that moment, how nonchalantly and gleefully he said it.
Not unusual with police, even in smaller and better run departments, or in fire/EMS, or in 911 in departments that have a reasonable pension system. Also not unusual with federal employees or military folks.