Conversation so far:
Why was William J. Donovan so involved in the Nuremberg trials?
In addition to seeking justice, William J. Donovan wanted to exact retribution for the torture and killing of OSS agents.
What was William J. Donovan's involvement in World War 1
During World War I, Major William J. Donovan led the 1st battalion, 165th Infantry of the 42d Division.

Question: Did he witness firsthand the crimes that were prosecuted in Nurenburg?
Self-contained rewrite: Did William J. Donovan witness firsthand the crimes that were prosecuted in Nurenburg?