In Chicago, the police work hard to keep crime out of some neighborhoods or, at the least, minimize crime. In other neighborhoods the policy seems to be one of containing crime within that neighborhood, with an emphasis on watching out for their fellow officers. In those communities people feel neither protected or served.
In fact, they feel surveilled. There are often cameras on the lightposts but crime is not dettered. Technology aside from smartphone video is used against, not for their benefit. Data is often hidden. Hidden with it is the information needed to remove officers who are positive dangers to citizens.
A very small number of officers are responsible for a disproportionately large amount of distrust, damage and harm in Chicago. they cost the city tens of millions of dollars in the short term. Over the long haul, the city has paid out enough to cover most of the pension debt owed to the honest officers.
Policy and negotiated union contracts protect them. otherwise an algorithm predicting officer involved wrongdoing could revolutionize policing in this city.