Benjamin Berell Ferencz (born March 11, 1920) is a Hungarian-born American lawyer. He was an investigator of Nazi war crimes after World War II and the Chief Prosecutor for the United States Army at the Einsatzgruppen Trial, one of the twelve military trials held by the U.S. authorities at Nuremberg, Germany. Later, he became a vocal advocate of the establishment of an international rule of law and of an International Criminal Court. From 1985 to 1996, he was Adjunct Professor of International Law at Pace University.