 Dalla Chiesa was murdered four years later, in September 1982.After Aldo Moro's 1978 assassination, Mino Pecorelli published some confidential documents, mainly Moro's letters to his family.In a cryptic article published in May 1978, Pecorelli drew a connection between Operation Gladio, NATO's stay-behind anti-communist organization (whose existence was publicly acknowledged by Prime Minister Giulio Andreotti in October 1990) and Moro's death.