John André

John André (2 May 1750 – 2 October 1780) was an officer of the British Army. He worked as a spy during the American Revolutionary War and aided in Major General Benedict Arnold's attempt to defect from the Continental Army to the British Army]].

Functioning as a spy in the Continental Army under the name John Anderson, André conspired with Benedict Arnold to have him become a General in the British Army and to surrender West Point to the British. He was followed by Ratonhnhaké:ton, an Assassin and ally of George Washington, and André was captured by Patriots as he was making his way out of West Point. Upon Ratonhnhaké:ton's advise, the Patriots searched him instead of shooting him on sight and they discovered a letter revealing Arnold's betrayal. André was later hanged by the Continental Army.

Reference

 * Assassin's Creed III