Stabilizes crime

Now it made sense. “Gentleman” Johnny Marcone had been the thug to emerge on top of the pile after the Vargassi family had dissolved into internal strife. The police department saw Marcone as a mixed blessing, after years of merciless struggle and bloody exchanges with the Vargassis. Gentleman Johnny tolerated no excesses in his organization, and he didn’t like freelancers operating in his city. Muggers, bank robbers, and drug dealers who were not a part of his organization somehow always seemed to get ratted out and turned in, or else simply went missing and weren’t heard from again.
Marcone was a civilizing influence on crime—and where he operated, it was more of a problem in terms of scale than ever before. An extremely shrewd businessman, he had a battery of lawyers working for him that kept him fenced in from the law behind a barricade of depositions and papers and tape recordings. The cops never said it, but sometimes it seemed like they were almost reluctant to chase him. Marcone was better than the alternative—anarchy in the underworld.

Storm Front Chapter 2, Page 21-22