David J. Scheffer is a senior fellow at the Council on Foreign Relations. His area of expertise is international law and international criminal justice. He served as the UN Secretary-General’s Special Expert on UN Assistance to the Khmer Rouge Trials from 2012 to 2018, and was the Tom A. Bernstein Genocide Prevention Fellow working with the Ferencz International Justice Initiative at the Simon-Skjodt Center for the Prevention of Genocide at the U.S. Holocaust Memorial Museum from 2019 to 2021.