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
Meyer Lansky Lansky convinced the Italian-American Mafia to place Siegel in charge of Las Vegas, and became a major investor in Siegel's Flamingo Hotel. To protect himself from the type of prosecution which sent Al Capone to prison for tax evasion and prostitution, Lansky transferred the illegal earnings from his growing casino empire to a Swiss bank account, where anonymity was assured by the 1934 Swiss Banking Act. Lansky eventually even bought an offshore bank in Switzerland, which he used to launder money through a network of shell and holding companies. In the 1930s, Lansky and his gang stepped outside their usual