The study, obtained by Federation of American Scientists secrecy blogger Steven Aftergood, is especially interesting because it purports to be based on the best evidence from social psychology, negotiation theory and analyses of professional interrogator cases in law enforcement, the military and intelligence. Included are two annotated case studies to illustrate techniques.
Interesting examples are given of how U.S. interrogators won over Japanese POWs during World War II by speaking with them respectfully about their culture, homeland, village and family.
His tricks included making it seem that he was the prisoner's greatest advocate and giving the impression that he already knew everything he was asking but simply needed to hear about it for the sake of bureaucratic formality. ("Hanns could probably get a confession of infidelity from a nun," one POW reportedly said of Scharff. After the war, the U.S. recruited Scharff, as it did with many German intelligence officers.)