Name at birth: Jacob Rubenstein
Jack Ruby shot and killed Lee Harvey Oswald, accused assassin of president John F. Kennedy, on 24 November 1963. Ruby, a Dallas nightclub owner with several minor arrests on his police record, fired his handgun as Oswald was being transferred in the basement garage of Dallas police headquarters; the killing was broadcast on live TV. Ruby was arrested, tried, and sent to prison; he died there of cancer in 1967.
According to the Warren Commission report, Ruby’s precise birthdate is unknown; Ruby himself most often gave 25 March 1911 as the date.