Given that eyewitnesses attested to Demjanjuk having been Ivan the Terrible at Treblinka, decades before, whereas documentary evidence seemed to indicate that he had served at Sobibor with little notoriety, OSI considered dropping the proceeding against Demjanjuk to focus on higher profile cases. But OSI's new director Allan Ryan chose to go ahead with the prosecution of Demjanjuk as Ivan the Terrible. In 1979, three guards from Sobibor gave sworn depositions that they knew Demjanjuk to have been a guard there, and two identified his photograph. OSI did not submit these deposits into evidence and took them as a further indication that Demjanjuk was Ivan the Terrible, though none of the guards mentioned Demjanjuk having been at Treblinka.