The second hanging of an Army of the Potomac soldier takes place north of Washington DC
Private Michael Lanaham of Company A , Second U.S. Infantry Regiment, was convicted of murdering a sergeant named Brenner who had hit him while he was in the guardhouse. Lanaham had soon after the initial incident loaded his musket and shot the sergeant to death. He was convicted of murder and hanged in northern Washington D.C. with units from five regiments of the regular infantry watching on. (By John Osborne)
Frank Moore, ed., The Rebellion Record: A Diary of American Events, with Documents, Narratives, Illustrative Incidents, Poetry, Etc. (New York: G.P.Putnam, 1862), IV: 6.