Benjamin Berell Ferencz (March 11, 1920 – April 7, 2023) was an 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 12 Subsequent Nuremberg Trials held by the U.S. authorities at Nuremberg, Germany. Later, he became an advocate of international rule of law and for the establishment of an International Criminal Court. From 1985 to 1996, he was an adjunct professor of international law at Pace University.