Three weeks after France was liberated in 1944, Renault surrendered "on condition that he would not be jailed until indicted." He was arrested outside Paris on 22 September 1944, on charges of industrial collaboration with Nazi Germany. At the time of his arrest, Renault "denied that his firm had received $120,000,000 from the Germans for war materials, said that he had kept his huge, much-bombed plant going at the request of Vichy to keep its materials and equipment out of Nazi hands and to save workers from deportation." He was incarcerated in Paris's Fresnes Prison being already seriously ill at the time. The records for the exact period of his incarceration at Fresnes would later turn out to be missing. Renault was moved on 5 October to a psychiatric hospital at Ville-Evrard in Neuilly-sur-Marne.
