Served on the Iowa Supreme Court from December 6, 1932, when he was elected to complete the unexpired term of Justice John M. Grimm, until December 31, 1942. He was Chief Justice for one year.
Born at Fort Dodge, Iowa, October 11, 1889. He was graduated from the Law Department of the University of Iowa in 1913. In the same year he began the practice of law at Fort Dodge where he continued to reside until coming on the Supreme Bench.
After his retirement from the court, Justice Mitchell returned to his private practice at Fort Dodge.
During World War II he served as a labor mediator for Presidents Roosevelt and Truman.
In 1947 he was approved as a member of the Interstate Commerce Commission. He served as Chairman of that body in 1954 and retired in 1959.
Justice Mitchell died in Chevy Chase, Maryland, August 2, 1969.