Philip Barton Key II
Date of Birth : Apr 5, 1818
Date of Death : Feb 27, 1859
Philip Barton Key was a United States Attorney for the District of Columbia. He is most famous for his public affair with Teresa Bagioli Sickles, and his eventual murder at the hands of her husband, Congressman Daniel Sickles of New York. Sickles defended himself by adopting a defense of temporary insanity, the first time the defense had been used in the United States.