Bastien-Thiry, who was involved with the still-mysterious organization, ""Vieil État-Major"", tried to make contact with the "Organisation armée secrète" (OAS), a paramilitary group opposed to de Gaulle's policy and to the National Liberation Front (FLN). According to Dr Pérez, OAS chief of intelligence and operations section (ORO), a messenger from Vieil État Major, named Jean Bichon, had met Bastien-Thiry in Algiers, but that was as far as it got. Bastien-Thiry never had contact with the OAS organization and he never stated that his direct chief was Jean Bichon, arrested later.