Sam Giancana was born Salvatore Giancana on June 15, 1908, in Chicago, Illinois. He was the son of Sicilian immigrants and grew up in the Chicago suburb of Oak Park.
As a young man, Giancana became involved in the Chicago Outfit, a criminal organization headed by Johnnie Torrio and Alphonse Capone, and one that controlled much of the illegal activity in the city, including gambling, prostitution, and bootlegging.

https://www.youtube.com/watch?v=xk0CrzYjiQg&t=65s