Ben Ferencz - last surviving prosecutor in biggest murder trial in history

At the end of World War II, Harvard graduate Ben Ferencz was part of a US Army unit that investigated German war crimes. — Ben Ferencz/dpa

It's not every young lawyer who makes history with his first case but that’s exactly what Ben Ferencz did.

Back in 1947, at just 27 years old, he acted as chief prosecutor in the trial of high-ranking SS officers accused of the murder of hundreds of thousands of people.