We are all aware of Burr's famous duel with Hamilton but were you aware of the treason charges brought against him? The charge trying to steal land in the Louisiana Purchase. The evidence was a letter "supposedly" written by Burr. In the end the grand jury discovered the letter was written by Wilkinson in an attempt to frame Burr. Wilkinson defended his letter saying it was a copy he made because he'd lost the original. In the end Burr was not guilty and was never convicted of anything but the damage had been done.
You can read more about this trial at Reports of the trials of Colonel Aaron Burr
You can also read the subpoena given to Thomas Jefferson to testify at the trial. Located at the Library of Congress.