Demjanjuk was at first represented by attorney Mark J. O'Connor of New York State; Demjanjuk fired him in July 1987 just a week before he was scheduled to testify at his trial. In his place, Demjanjuk hired Israeli trial lawyer Yoram Sheftel whom O'Connor had hired as co-counsel. Sheftel focused the defense largely on the claim that Demjanjuk's Trawniki card was a KGB forgery. Most significantly, Sheftel called Dr. Julius Grant, who had proven that the Hitler diaries were forged. Grant testified that the document had been forged. He also called Dutch psychologist Willem Albert Wagenaar, who testified to flaws in the method by which Treblinka survivors had identified Demjanjuk as Ivan the Terrible. Additionally, Sheftel alleged that the trial was a show trial, and referred to the trial as "the Demjanjuk affair," alluding to the famous antisemitic Dreyfus Affair.