Charged in 1947 at the Nuremberg Medical Trials, held in Frankfurt, Mennecke gave evidence that was almost as frank as his missives to his wife. He detailed, for example, how in November 1941 he was suddenly instructed to select prisoners on ‘political and racial grounds’ in addition to the ‘medical’ grounds invoked for ‘mercy killing’. From that moment on Jews were not medically examined but just added to the selection list for being Jews.

