Richard Cain (October 4, 1931-December 20, 1973) was a notoriously corrupt Chicago police officer, made man in the Chicago Outfit and a close associate of Mafia boss Sam Giancana. Several conspiracy theorists have claimed that Cain was directly involved in the 1963 assassination of U.S. President John F. Kennedy.
According to a biography of Sam Giancana written by his family, Giancana told his younger brother that it was Cain and Charles Nicoletti, not Lee Harvey Oswald, who were in the Texas Book Depository on November 22, 1963.[13] This claimed was never proved.
In 1996, based on information from Brazilian journalist Claudia Furiati, author Eric Hamburg claimed that Cain had been involved with Dave Yaras and Lenny Patrick during the assassination.[citation needed]
Since his death, other researchers, including Larry Hancock[citation needed] and Cain's half brother Michael J. Cain,[14] have investigated his rumored ties to the JFK assassination. Neither has obtained any conclusive evidence to support his involvement in any aspect of the assassination. Michael J. Cain discovered through a witness his half brother was waiting to testify before a grand jury in Chicago on November 22, 1963 when the news was announced John Kennedy had been shot. Michael Cain said that the grand jury files were destroyed.[15]
Operation 40/operation Northwoods/operation Mockingbird/Suite 8F group/ The Tangled Web: The Life and Death of Richard Cain - Chicago Cop and Mafia Hitman