Walter Smith Cox was a professor of law at what was then called Columbian University, known today as The George Washington University, in Washington, D.C.. On February 26, 1879, Cox was nominated by President Rutherford B. Hayes to a new seat on the United States District Court for the District of Columbia created by 20 Stat. 320. He was confirmed by the United States Senate on March 1, 1879, and received his commission the same day. During his service, he presided over the trial of Charles J. Guiteau, the assassin of President James A. Garfield. Cox retired from the federal bench on July
Charles J. Guiteau insane manner" he had so often observed in asylums, adding that Guiteau was a "morbid egotist" with "a tendency to misinterpret the real affairs of life". He thought the condition to be the result of "a congenital malformation of the brain". George Corkhill, who was the District of Columbia's district attorney and on the prosecuting team, summed up the prosecution's opinion of Guiteau's insanity defense in a pre-trial press statement that also mirrored public opinion on the issue. Guiteau became something of a media sensation during his entire trial for his bizarre behavior, which included his frequently cursing and insulting