In February 2002, Judge Matia revoked Demjanjuk's US citizenship. Matia ruled that Demjanjuk had not produced any credible evidence of his whereabouts during the war and that the Justice Department had proved its case against him. Demjanjuk appealed to the US Court of Appeals for the Sixth Circuit, which on 30 April 2004 ruled that Demjanjuk could be again stripped of his US citizenship because the Justice Department had presented "clear, unequivocal and convincing evidence" of Demjanjuk's service in Nazi death camps. The United States Supreme Court declined to hear his appeal in November 2004.