> Seriously though, as the article itself says, the problem was never even to identify these "crews". It was about the political will to do something about it.

A big part of the problem is the police unions, which routinely prevent leaders in the police departments from firing or otherwise disciplining police officers who routinely cause problems.

A big part of the reason there is no political will to do something about these "crews" is because the leadership knows the unions will make it as difficult as possible to get rid of them. So why spend the political capital if you're going to get stymied at every step anyway?