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 and distraught after his final encounter with Blaine, he decided the only solution was to remove Garfield and elevate Vice President Chester A. Arthur, an acolyte of Senator Roscoe Conkling, the Stalwart leader who managed Grant's 1880 campaign and was not on friendly terms with Garfield. Guiteau felt that God told him to kill the president; he felt that such an act would be a "removal" as opposed to an assassination. He also felt that Garfield needed to be killed to rid the Republican Party of Blaine's influence. Borrowing $15 from George Maynard, a relative by marriage, Guiteau set out