Mary Surratt, Powell, Herold, and Atzerodt were hanged in the Old Arsenal Penitentiary on July 7. Mary Surratt was the first woman executed by the United States government. O'Laughlen died in prison in 1867. Mudd, Arnold, and Spangler were pardoned in February 1869 by Johnson. Spangler, who died in 1875, always insisted his sole connection to the plot was that Booth asked him to hold his horse.