Expert : The problem with the current system is that it has no way to prevent a person from being able to get their hands on an unregistered firearm and then using it. 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 .
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 .