Granma, 24 January 1970:

From the psychological point of view, Dr. Barral has the following opinion of the personality of the prisoner who is responsible for many criminal bombings of the people of DRV:
He showed himself to be intellectually alert during the interview. From a morale point of view he is not in traumatic shock. He is neither dejected nor depressed. He was able to be sarcastic, and even humorous indicative of psychic equilibrium. From the moral and ideological point of view he showed us he is an insensitive individual without human depth, who does not show the slightest concern, who does not appear to have thought about the criminal acts he committed against a population from the almost absolute impunity of his airplane, and that nevertheless those people saved his life, fed him, and looked after his health, and he is now healthy and strong. I believe that he bombed densely populated places for sport. I noted he was hardened, that he spoke of banal things as if he were at a cocktail party.
During the interview he quietly drank three cups of coffee and smoked one of the cigarettes the Vietnamese had placed on the central table.