Black-on-black and white-on-white homicides are collectively a separate issue from police corruption and should be dealt with.  However, the Justice Department investigated and reported on a black-hat police culture in the Chicago Police Department that needs exposing and correcting.  There are no excuses for this long standing black-hat culture which is a serious impediment to effectively dealing with the problem of crime in Chicago.  These are just statements of fact, John, and should not be confused with gratis, unwarranted criticism.  Naming an issue like the black-hat culture of the Chicago Police Department is the first step in cleaning it up.  You want crime curtailed in Chicago?  Well, get the Chicago Police Department cleaned up and up to speed, then.  Now, unhandled, they are an embarrassment and contribute to Chicago's crime problem.