New documents surfaced in September indicating that Gabrielle “Coco” Chanel may have played a double role during World War II, serving not only as an informant for the Nazis but also as a member of the French Resistance. But a historian who has analysed the new evidence says he has “serious doubts” about her alleged membership in La Résistance, suggesting the French fashion icon may have used the documents to restore her reputation after the war.