Jack Whalen

Jack Whalen , also called Jack OHara and The Enforcer, was a criminal and freelance contract killer and bookie, who worked for the Los Angeles crime family, although he also was associated with Benjamin Bugsy Siegel, the Shannon brothers and Mickey Cohen during the 1940s and 1950s.

Jack F. Whalen was born on May 11, 1918 in Missouri. Whalens father Fredwho was also a career criminalhad enrolled Jack in military school to give his son a better life. Jack played polo in school and piloted bombers in World War II. After the war, he married into a rich family in Los Angeles however, by 1955, his own criminal career had begun. He was soon called The Enforcer because he was so tough he didnt need a gun.

Source: Wikipedia