The New York Times has published a letter from former war crime prosecutor Benjamin Ferencz.

Ferencz was a prosecutor at the Nuremberg war trials.  His website is here.  From his Bio.

The U.S. had decided to prosecute a broad cross section of Nazi criminals once the trial against Goering and his henchmen was over. General Telford Taylor was assigned as Chief of Counsel for 12 subsequent trials. Ferencz was sent with about fifty researchers to Berlin to scour Nazi offices and archives. In their hands lay overwhelming evidence of Nazi genocide by German doctors, lawyers, judges, generals, industrialists, and others who played leading roles in organizing or perpetrating Nazi brutalities. Without pity or remorse, the SS murder squads killed every Jewish man, woman, and child they could lay their hands on. Gypsies, communist functionaries, and Soviet intellectuals suffered the same fate. It was tabulated that over a million persons were deliberately murdered by these special “action groups.

Ferencz became Chief Prosecutor for the United States in The Einsatzgruppen Case, which the Associated Press called “the biggest murder trial in history.” Twenty-two defendants were charged with murdering over a million people. He was only twenty-seven years old. It was his first case.

All of the defendants were convicted. Thirteen were sentenced to death. The verdict was hailed as a great success for the prosecution. Ferencz’s primary objective had been to establish a legal precedent that would encourage a more humane and secure world in the future.