The investigation is reopened in 1966 after Garrison reads the Warren Report and notices what he believes to be multiple inaccuracies. Garrison and his staff interrogate several witnesses to the Kennedy assassination, and others involved with Oswald, Ruby, and Ferrie. One such witness is Willie O'Keefe (Kevin Bacon), a male prostitute serving five years in prison for soliciting, who reveals he witnessed Ferrie discussing a coup d'ĂŠtat. As well as briefly meeting Oswald, O'Keefe was romantically involved with a man called "Clay Bertrand". Jean Hill (Ellen McElduff), a teacher who says she witnessed shots fired from the grassy knoll, tells the investigators that Secret Service threatened her into saying three shots came from the book depository, revealing changes that were made to her testimony by the Warren Commission. Garrison's staff also test the single bullet theory by aiming an empty rifle from the window through which Oswald was alleged to have shot Kennedy. They conclude that