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 to give his friend a second chance. Despite this reprieve, Siegel continued to lose money on the Flamingo. A second meeting was then called. However, by the time this meeting took place, the casino turned a small profit. Lansky again, with Luciano's support, convinced the other investors to give Siegel some more time. However, when the hotel started losing money again, the other investors decided that Siegel was finished. It is widely believed that Lansky himself was compelled to give the final okay on eliminating Siegel due to his long relationship with him and his stature in the organization. On