One of my friends was the Police Commissioner for Baltimore City post Freddy Grey. What you are stating here is pretty much what he told me as a significant number of the African American (AA) population and even some police are involved in Drug trafficking and that the violence and arrest levels were high there because of the numbers plain and simple. The lack of social mobility due to cultural issues in the AA community are big drivers in this and have been for awhile. It is not racism but these inconvenient truths.
I think the AA community doesn’t really exist as a system of shared values. Most blacks are law abiding but they are vistims of the lawless elements that in the bad sections of Baltimore, Philadelphia,Newark etc. are full of drugs and street crime. White racial prejudice, where it exists, hardly affects these people. Dirty cops and clueless administrators, like Jakob Frey and Bill DeBlasio do.