February 27, 1859 –
Censured Congressman Dan Sickles of New York (who escorting a known prostitute into State chambers) shot and killed Philip Barton Key, son of Francis Scott Key and U.S. Attorney for the District of Columbia.
The younger Key was having an affair with the congressman’s wife at the time.
He was tried on a charge of murder, but was acquitted after a sensational trial involving the first use of the insanity defense in U.S. history.
An interesting aside: Sickle went on to become a Union general and was involved in some of the bloodiest fighting at Gettysburg and lost his own right leg in the battle. He had the leg preserved and sent to Washington D.C., where it was exhibited in a little wooden coffin at the Medical Museum of the Library of Congress. Sickles frequently visited it himself.
The Haus of Dcaligari 