Better known for his killing of Alexander Hamilton, Aaron Burr was also arrested and tried for treason. He was held as a prisoner at Fort Stoddert, in what is today’s Mount Vernon, Alabama, after his 1807 arrest in McIntosh. Burr had leased 40,000 acres (16,000 ha) of land—known as the Bastrop Tract—along the Ouachita River, in what is now Louisiana, from the Spanish government. Burr’s goal was to create an independent country in the center of North America and/or the present-day Southwestern United States and parts of present-day Mexico. The prosecution had failed to prove that Burr had committed an “overt act,” as the Constitution required. As a result, the jury acquitted the defendant.