Mark Lane (February 24, 1927 – May 10, 2016) was an American attorney, New York state legislator, civil rights activist, and Vietnam war-crimes investigator. He is best known as a leading researcher, author, and conspiracy theorist on the assassination of United States President John F. Kennedy. From his 1966 number-one bestselling critique of the Warren Commission, "Rush to Judgment", to "Last Word: My Indictment of the CIA in the Murder of JFK", published in 2011, Lane wrote at least four major works on the JFK assassination and no fewer than ten books overall.