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
John R. Brady shot by an assassin, Charles Guiteau. Arthur, then Vice President, became President. Arthur was at home around midnight on the night of September 19, 1881 with Police Commissioner Stephen B. French, District Attorney Daniel G. Rollins, and attorney Elihu Root, when he learned in a telegram from members of Garfield's cabinet that Garfield had died. The cabinet members wired Arthur their advice that he should "take the oath of office as president of the United States without delay." It was after midnight when Arthur and his guests dispatched messengers to locate a judge who could administer the presidential oath. The