Aaron Burr (February 6, 1756 - September 14, 1836) was an American politician and lawyer who served as the third vice president of the United States from 1801 to 1805 under Thomas Jefferson. He is best known for killing Alexander Hamilton in a duel in 1804, which ended his national political career. Burr later faced charges of treason, was acquitted, and remains one of the most controversial figures of early American history.