"Did the Mob Kill JFK?" and "JFK: The Ruby Connection" are to air back-to-back Sunday on Discovery.
"New information and never before heard details of a startling confession raise new questions on just who was behind the 1963 assassination of President John F. Kennedy and the subsequent killing of Lee Harvey Oswald by Jack Ruby," the network said in a news release.
A federal commission headed by Supreme Court Justice Earl Warren concluded Oswald, acting alone, killed Kennedy in Dallas Nov. 22, 1963.
Notable deaths of 2014 [PHOTOS]