Master Sergeant Coston was a member of the 24th Infantry Regiment, 25th Infantry Division. He was taken Prisoner of War while fighting the enemy in North Korea on 28 November 1950 and died while a prisoner on 31 March 1951.

Coston was awarded the Combat Infantryman Badge, the Prisoner of War Medal, the Korean Service Medal, the United Nations Service Medal, the National Defense Service Medal, the Korean Presidential Unit Citation and the Republic of Korea War Service Medal.