The Toronto Star reports Edmonton filmmaker Michael Jorgenson found Robertson, 76, living in a rural Vietnam village stooped with age, unable to speak English, remember his birthday or names of the children he left behind in the U.S.

It's a story difficult to believe considering the U.S. military places such a priority on bringing every service member home, whenever possible.

Jorgenson told The Star he was also skeptical when Vietnam vet Tom Faunce came to him and explained a man he'd found in Vietnam was a former "Army brother" listed as killed in action and forgotten. He says he became convinced only after going to Vietnam and meeting Robertson himself.

What he found was revealed to filmgoers in an invitation-only screening of "Unclaimed" at a Toronto theater earlier this month.