RFK Must Die: The Assassination of Bobby Kennedy is a 2007 investigative documentary by Irish writer and filmmaker Shane O'Sullivan. The film expands on O'Sullivan's earlier reports for BBC "Newsnight" and "The Guardian" and explores conspiracy theories related to the assassination of United States Senator Robert F. Kennedy on 5 June 1968. The title comes from a page of "free writing" found in assassin Sirhan Sirhan's notebook after the shooting upon which Sirhan had written "R.F.K. must die - RFK must be killed Robert F. Kennedy must be assassinated... before June 5 '68."