Posttraumatic stress disorder
He was weary of war and espionage in general and bitter by the loss of several friends. In addition, most of the local populace had been unaware of his resistance role. There was also a lot of emotional fatigue in acting in public as a Nazi enthusiast. During the 1960s he suffered severe mental illness, likely due to what is now known as Posttraumatic stress disorder. He received inadequate medical attention, and died from a perforated gastric ulcer in 1970, before his 52nd birthday.