Expert : Trial of Nazi war crimes suspect Ivan Demjanjuk would be last of its kind . Leading Nazis prosecuted at Nuremberg but many lesser Nazis escaped conviction . Struggle to prosecute Nazis and creation of International Criminal Court . ICC has remit to probe war crimes , genocide , crimes against humanity .
Expert : Trial of Nazi war crimes suspect John Demjanjuk could be last of its kind . Leading Nazis prosecuted at Nuremberg but many lesser Nazis escaped justice . Struggle to prosecute Nazis influenced creation of International Criminal Court . ICC has remit to probe war crimes , genocide , crimes against humanity .