Perfidy is a book written by Ben Hecht in 1961. The book describes the events surrounding the 1954–1955 Kastner trial in Jerusalem. The book is based on transcripts from the trial and concludes that in 1944 Rudolf Kastner deliberately withheld from the Jews in Hungary knowledge that the trains the Nazis were putting them on were taking them to death by the gas chamber, not to a fictitious resettlement city as the Nazis claimed and that Kastner then lied about it under oath. One of the supporting facts presented is that, in the Supreme Court appeal of the original verdict implicating Kastner, all five Supreme Court Judges upheld Judge Halevi's initial verdict on the "criminal and perjurious way" in which Kastner after the war had testified on behalf of Nazi war criminal Kurt Becher. Judge Silberg summed up the Supreme Court finding on this point: "[respondent Malchiel] Greenwald has proven beyond any reasonable doubt this grave charge." Most of the judgement was later overturned. Source: Wikipedia (en)