USMA Class of 1949, Second Lieutenant Magruder was a member of Company F, 2nd Battalion, 8th Cavalry Regiment, 1st Cavalry Division. He was Killed in Action while fighting the enemy in South Korea on 3 September 1950.

Magruder was awarded the Purple Heart, the Combat Infantryman's Badge, 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.