She was the first African-American woman to be sworn in as United States Attorney for the Western District of Oklahoma.

Born September 30, 1953, in Oklahoma City,[1][2] Miles-LaGrange, received a certificate from the University of Ghana in Accra, Ghana, West Africa in 1973, and graduated cum laude from Vassar College with a Bachelor of Arts degree in 1974.

She was, at the same time, a lecturer in the Women's Studies Program at the University of Maryland, College Park in 1981.

She was a trial attorney of Office of Enforcement Operations, United States Department of Justice from 1982 to 1983.

She took inactive senior status on November 5, 2018, meaning that while she remains a federal judge, she will no longer hear cases or participate in the business of the court.