Corporal Larkin was a member of Company C, 1st Battalion, 38th Infantry Regiment, 2nd Infantry Division. He was taken Prisoner of War while fighting the enemy near Hoengsong, South Korea on February 12, 1951 and died while a prisoner on April 30, 1951. CPL Larkin's remains were recovered and identified 2012. His name is permanently inscribed on the Courts of the Missing at the Honolulu Memorial.