Lewis Thornton Powell aka Lewis Payne.
Co-conspirator with John Wilkes Booth in plot to assassinate U.S. Secretary of State William H. Seward and President Abraham Lincoln on April 14, 1865.
Powell was a Confederate soldier wounded at Gettysburg. He later served in Mosby's Rangers before working with the Confederate Secret Service in Maryland.
Payne was captured and executed by hanging on July 7, 1865, aged 21.