 He alleges that communists at times betrayed non-communists to the Gestapo and that Aubrac was linked to harsh actions during the purge of collaborators after the war.In 1990, Barbie, by then "a bitter dying Nazi", named Aubrac as the traitor.To counteract the accusations levelled at Moulin, Daniel Cordier, his personal secretary during the war, wrote a biography of his former leader.