Which U.S. Supreme Court justice served as a prosecutor at the Nuremberg trials?

The U.S. Supreme Court justice who served as a prosecutor at the Nuremberg trials was Robert H. Jackson.

President Harry S. Truman appointed Jackson the United States’ chief prosecutor at the International Military Tribunal after World War II. Jackson had been appointed to the Supreme Court in 1941, but he took leave from the Court to organize the American case and represent the United States at Nuremberg.

He helped negotiate the London Charter, which established the tribunal’s legal framework, and delivered the prosecution’s opening statement on 21 November 1945. He also played a leading role in presenting evidence and cross-examining senior Nazi defendants, including Hermann Göring.

The first Nuremberg trial ran from November 1945 to October 1946. Jackson returned to the Supreme Court afterward and remained a justice until his death in 1954. The other options were also prominent justices, but none served as the American chief prosecutor at Nuremberg.