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 under the name John Anderson while in the Continental Army, André conspired with Benedict Arnold to have him become a General in the British Army and to surrender West Point to the British. However, 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 advice, the Patriots searched him instead of shooting him on sight, where they discovered a letter revealing Arnold's betrayal. André was later hanged by the Continental Army.
Reference