David John Scheffer (born September 18, 1953, in Norman, Oklahoma) is an American lawyer and diplomat who served as the first United States Ambassador-at-Large for War Crimes Issues, during President Bill Clinton's second term in office.

He began his legal career at the international law firm Coudert Brothers, working for a time in their Singapore office.

Scheffer then sat on the Deputies Committee of the National Security Council from 1993 until 1996, and then became the first Ambassador-at-Large for War Crimes Issues.

Though Scheffer signed the Rome Statute that established the ICC on behalf of the U.S. in 2000, he was a highly vocal critic of many aspects of the court and the negotiation process.

[3][4] On January 18, 2012, Scheffer was appointed by Secretary General Ban Ki-moon as the U.N. Special Expert to advise on the United Nations Assistance to the Khmer Rouge Trials.