Crumbo was also an independent prospector in New Mexico in the late 1950s, who found one of the largest beryllium veins in the nation, valued at millions of dollars.
[8] At the age of 19, Crumbo earned a scholarship to the American Indian Institute in Wichita, Kansas, where he graduated as valedictorian.
[8] Subsequently, Crumbo joined the Bacone College in Muskogee as Director of Art from 1938 to 1941, succeeding Acee Blue Eagle (Muscogee).
[2] In 1939, the United States Treasury Department commissioned him to paint murals on the walls of its building in Washington, D.C.[1][10] A few years later he curated a collection of Native American art at the Thomas Gilcrease Institute in Tulsa.
[2] He exhibited at numerous shows and became more widely known both nationally and internationally because he adapted some of his work to techniques of engraving and printing, making multiple originals.
"[5] Crumbo became "a major stockholder in Taos Uranium and Exploration Corp. that was formed by a group of Texas investors to develop the claims" for beryllium and copper.
[8] He aided the Isleta Pueblo Indians of New Mexico to gain federal recognition and donated money to help the Citizen Potawatomi build a cultural heritage center in Shawnee.
[5] Crumbo's work was part of Stretching the Canvas: Eight Decades of Native Painting (2019–2021), a survey at the National Museum of the American Indian George Gustav Heye Center.