Giancana was brought in connection with the dead of Marilyn Monroe in August 5 , 1962 , the murder of president John F. Kennedy in November 2 1963 .
Giancana was was called in for help to assassinate the Cuban leader Fidel Castro by the CIA .
Giancana was brought in connection with the dead of Marilyn Monroe in August 5 , 1962 , the murder of president John F. Kennedy in November 2 1963 , and was called in for help to assassinate the Cuban leader Fidel Castro by the CIA .