There are gang units and street crimes units all over the country in cities very similar to Louisville. Metro was screwed up for about a decade by a Chief and a Mayor who thought those kinds of units weren't worth the minority protest problems they led to. You can't have an effective department that is trying to kiss the rear end of a community who dislikes aggressive enforcement more than violent crime. 10 years later nobody in charge knows much about how to track gangs, repeat offenders, or other