Nash was first convicted in 1913. He and a friend, Nollie "Humpy" Wortman, stole nearly $1,000 from a store in Sapulpa, Oklahoma. While escaping, Nash suggested they hide the evidence. As Wortman went to bury the money, Nash shot him in the back. He was arrested hours later and sentenced to life in the Oklahoma State Penitentiary. On March 28, 1918, Nash's sentence was reduced to ten years after he convinced the warden he wanted to join the army and fight in World War I. Nash signed his military registration card on June 12, 1918, and was released on August 16, 1918. Nash saw action in Belleau Wood, France, before the end of the war. (The fighting in Belleau Wood ended in June, 1918, and the war ended November 11 of that year).