Manhattan Italian emigration. Lucky Luciano established Cosa Nostra in Manhattan, forming alliances with other criminal enterprises, including the Jewish mob, led by Meyer Lansky, the leading Jewish gangster of that period. From 1920–1933, Prohibition helped create a thriving black market in liquor, upon which the Mafia was quick to capitalize. As in the whole of New York City, Manhattan experienced a sharp increase in crime during the 1960s and 1970s. Since 1990, crime in Manhattan has plummeted in all categories tracked by the CompStat profile. A borough that saw 503 murders in 1990 has seen a drop of nearly 88% to
Gambino crime family police. The New York families were outraged by this gratuitous killing that raised a large amount of public furor. Anastasia also alienated one of Luciano's powerful associates, Meyer Lansky, by opening casinos in Cuba to compete with Lansky's. Genovese and Lansky soon recruited Carlo Gambino to the conspiracy by offering him the chance to replace Anastasia and become boss himself. In May 1957, Frank Costello escaped a Genovese-organized murder attempt with a minor injury and decided to resign as boss. However, Genovese and Gambino soon learned that Costello was conspiring with Anastasia to regain power. They decided to kill Anastasia.