According to Wikipedia: "Aaron Burr, Jr. (February 6, 1756 - September 14, 1836) was an American politician, Revolutionary War participant, and adventurer. He served as the third Vice President of the United States (1801-1805), under Thomas Jefferson, and was the first vice president to never serve as president... After Burr left the vice-presidency at the end of his term in 1805, he journeyed into what was then the West, particularly the Ohio River Valley and the lands acquired in the Louisiana Purchase. Burr was preparing to lead a filibuster into Spanish possessions in Mexico in case of war with Spain, which would have been of dubious legality considering the Neutrality Act of 1794. Due to the rumors and the sullying of Burr's name by means of claims as far-fetched as Burr's desire to secede from the United States and form his own monarchy in the western half of North America, Burr was arrested in 1807 and brought to trial on charges of treason, for which he was acquitted. After several years in self-imposed exile in Europe, Burr returned to practicing law in New York City and lived a largely reclusive existence until his death."
