Throughout that fateful night, and in the following days, Augur was instrumental in mobilizing troops in his command to pursue and eventually capture Booth and his co-conspirators, including detailing the detachment of the 16th Regiment New York Volunteer Cavalry under the command of Lt. Edward P. Doherty to follow a lead given to Stanton by a Union spy which eventually led to Lt. Doherty and his detachment tracking down and cornering President Lincoln's assassin, Booth, and his associate, David Herold, in a tobacco barn near Port Royal, Virginia.