Mob Boss Files: Sam Giancana

Sam Giancana, known as “Momo,” led the Chicago Outfit during the 1950s and ’60s, blending underworld power with political influence.

He was closely watched for his alleged connections to the CIA, the Kennedys, and plots to assassinate Fidel Castro.

Known for his high-profile lifestyle and violent tactics, Giancana’s power peaked during the golden age of the mob.

He was murdered in 1975 — shot multiple times in his own home, reportedly just before testifying before a grand jury.