Prosecutors argued that Demjanjuk concealed his history when he came to the United States in 1952 . NEW : Judge reopens deportation hearings on accused former death camp guard . NEW : John Demjanjuk 's attorney says client 's health `` has seriously deteriorated . '' Demjanjuk , 89 , has been fighting charges of war crimes for more than two decades . He was a commander at the Sobibor and Treblinka extermination camps in Poland during World War II.
NEW : Judge reopens deportation hearings on accused former death camp guard . NEW : John Demjanjuk 's attorney says client 's health `` has seriously deteriorated . '' Demjanjuk , 89 , has been fighting charges of war crimes for more than two decades . He was a commander at the Sobibor and Treblinka extermination camps in Poland during World War II.