Born in Lonoke, Arkansas, Trimble received a Bachelor of Laws in 1902 from the University of Arkansas School of Law at Fayetteville.
[1] On June 17, 1937, Trimble was nominated by President Franklin D. Roosevelt to a seat on the United States District Court for the Eastern District of Arkansas vacated by Judge John Ellis Martineau.
Trimble was confirmed by the United States Senate, and received his commission on June 18, 1937.
He served as Chief Judge from 1948 to 1957 and assumed senior status on January 14, 1957.
Trimble served in that capacity until his death on July 6, 1965, in Little Rock, Arkansas.