Private First Class Quintana was a member of Company K, 3rd Battalion, 29th Infantry Regimental Combat Team. He was listed as Missing in Action while fighting the enemy near Hadong, South Korea on July 27, 1950. He was presumed dead on December 31, 1953.

In December 1950, a set of unidentified remains was recovered from a grave near Chinuju-Hadong Highway. Those remains were buried in the Masan United Nations Military Cemetery as Unknown X-183. In 1951, the graves at Masan cemetery were exhumed and transferred to the U.S. Army's Central Identification Unit (CIU) in Kokura, Japan, for identification.

Several attempts were made to associate X-183 with unresolved casualties, however with limited technology the remains could be attributed to 41 possibilities. September 1955 it was determined the remains were "unidentifiable" and were transferred to the National Memorial Cemetery of
the Pacific in Hawaii, known as the "Punchbowl."

In December 2014, a family member requested the disinterment of Unknown X-183 based on documents identifying another soldier with tentative association. In May 2016, the grave was exhumed and sent to the DPAA laboratory for identification. DNA analysis and circumstantial evidence were used in the identification of his remains. His name is permanently inscribed on the Courts of the Missing at the Honolulu Memorial.

For more information on DPAA please visit www.dpaa.mil.