Born in Holtville, California, Copple received an Associate of Arts degree from Long Beach City College in 1934, a Bachelor of Arts degree from the University of California, Berkeley in 1948, and a Juris Doctor from the UC Berkeley School of Law in 1951.
He was a self-employed contractor from 1945 to 1948 and from 1951 to 1952, entering private practice in Yuma, Arizona from 1952 to 1965.
[1] On September 30, 1966, Copple was nominated by President Lyndon B. Johnson to a new seat on the United States District Court for the District of Arizona created by 80 Stat.
He was confirmed by the United States Senate on October 20, 1966, and received his commission on November 3, 1966.
He assumed senior status on November 30, 1983, serving in that capacity until his death on September 14, 2000, in Cottonwood, Arizona.