As a cultural note, in the 1920s through the ‘40s, when much of America was segregated, towns and smaller cities would often have a white side and a black side. The white side had the official government, but the black side had its own leadership, often run by the black side’s undertaker, who was likely the wealthiest person in the black side.
Though white policemen were expected to keep some order everywhere, this was limited on the black side, which had its own rules for keeping order.
A big rule was that often transient blacks of bad character would show up in the black side of town, and if they were known or discovered to be of bad character they were sent packing, told to keep moving as “their kind” wasn’t wanted there.
For its part, the white side treated transient whites of bad character the same way. But by the 1940s and ‘50s, the segregation system started collapsing. Returning vets wanted nothing to do with it, or other moribund social systems they despised, so refused to sustain them and openly despised them.
Unfortunately, with the collapse of segregation and these other systems was also lost their means of maintaining good character among the citizenry. This gave license to troublemakers and scoundrels to prey on the weak and create turmoil.
What? Taking a way segregation did not cause crime. That makes no sense. Urban inner city minorities self segregate and they are the largest element of crime. Integrated communities are aren’t the problem.