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
James Rudolph Garfield witnessed the shooting of their father by disgruntled office-seeker Charles J. Guiteau at the Baltimore and Potomac railroad station in Washington. The President and his sons were waiting for a train en route to Williams College in Williamstown, Massachusetts, where young James had been recently accepted, when the shooting took place. Following his father's death on September 19, 1881, he studied at Williams College. He received his A.B. degree in 1885, and then attended Columbia Law School. In 1888, he was admitted to the Ohio bar and established the Cleveland, Ohio-based law firm of Garfield and Garfield, with his brother