70: William B. Mumford, a citizen of New Orleans, having been convicted before a military commission of treason and an overt act thereof, tearing down the United States flag from a public building of the United States, after said flag was placed there by Commodore Farragut, of the United States Navy: It is ordered that he be executed according to sentence of said military commission on Saturday, June 7, inst., between the hours of 8 a.m. and 12 a.m. under the directions of the provost-marshal of the District of New Orleans, and for so doing this shall be his sufficient warrant.On June 7, just before noon, Mumford was taken to be hanged in the courtyard of the mint itself, a place that Butler had decided "according to the Spanish custom" would be the ideal place.

After he was hanged, on June 18, Confederate Governor of Louisiana Thomas Overton Moore issued a statement declaring Mumford a hero and a model.

Robert E. Lee demanded that Union General Henry Wager Halleck explain how execution could have occurred for a crime committed before New Orleans was occupied.

Confederate President Jefferson Davis issued a proclamation stating that Benjamin Butler should be considered a criminal and worthy of hanging.

In 1950, the Ladies' Memorial Association moved Mumford's remains to the base of the Confederate monument at Greenwood Cemetery, New Orleans.

"[3] Mumford's name has been mentioned alongside figures such as Abraham Lincoln, Elmer E. Ellsworth, John Pelham and Stonewall Jackson, which represent "martyred heroes and violent villains for both the North and South.

"[3] At the Confederate Memorial Hall Museum, a piece of the flag that Mumford tore, the rope that he was hanged with, and a large image of him are on display.