A few good ol’ boys need to go over there and teach the locals how to do things properly as in shoot, shovel and shut up, clean up your brass and tidy up the scene, and how to disappear into the background.
As in most places, 1-2% of the population accounted for over 90% of the crime. On slow nights, they would go through their files to identify the worst offenders. Then some dark night, said offenders would turn up dead in a street fight or maybe a drug overdose.
The cops would diligently investigate whodunit but would have to close their files due to lack of evidence. That was just one of the occupational risks you took when you chose crime as a career.