In August, the infantryman's remains were identified through DNA analysis, a chest X-ray, and dental records, the Defense POW/MIA Accounting Agency announced this week.
"It's going to give hope to a lot of families," his sister Ruth Tepper, 72, of Temperance, said.
Private Duquette, who attended Waite High School, was a few weeks shy of his 18th birthday, Feb. 14, 1949, when he enlisted in the Army. The Korean War began in June, 1950, and on July 11, he and his comrades engaged in combat against North Korean forces near Choch'iwon, South Korea.
He could not be accounted for and was declared missing in action. With no further information, authorities declared Private Duquette deceased in December, 1953, the POW/MIA accounting agency said.