In August 1977, Demjanjuk was accused of having been a Trawniki man. Based on eyewitness testimony by Holocaust survivors in Israel, he was identified as the notorious Treblinka extermination camp guard known as "Ivan the Terrible". Demjanjuk was extradited to Israel in 1986 for trial. In 1988, Demjanjuk was convicted and sentenced to death. He maintained his innocence, claiming that it was a case of mistaken identity. In 1993 the verdict was overturned by the Israeli Supreme Court, based on new evidence that cast reasonable doubt over his identity as "Ivan the Terrible". Although the judges agreed that there was sufficient evidence to show that Demjanjuk had served at Sobibor, Israel declined to prosecute. In September 1993 Demjanjuk was allowed to return to Ohio. In 1999, US prosecutors again sought to deport Demjanjuk for having been a concentration camp guard, and his citizenship was revoked in 2002. In 2009, Germany requested his extradition for over 27,900 counts of acting as an accessory to murder: one for each person killed at Sobibor during the time when he was alleged to have served there as a guard. He was deported from the US to Germany in that same year. On 12 May 2011, he was convicted and sentenced to five years in prison.