Unclaimed is a 2013 Canadian documentary film about a man who claims to be former Special Forces Green Beret Master Sgt.

Jean Robertson-Holley, Robertson's surviving sister, was convinced the man was her brother but initially declined DNA testing as unnecessary.

[2] The man claiming to be Robertson states in the film that he was kept in a bamboo cage in the jungle by the North Vietnamese and tortured for a year.

Then, confused and badly injured, he was released and married a Vietnamese woman who had helped to care for him, assuming the name of her dead husband.

Aged 76 as of 2013[update], he lives in a remote village in south central Vietnam and is unable to remember his birthday or his American children's names and is now only able to speak Vietnamese.

Leading up to the film's premiere, Jorgensen said Robertson's American wife and two children had volunteered to participate in DNA testing but withdrew their intent.

[4] The Toronto Star reported, "The film is already generating heated debate online, along with allegations the man claiming to be Robertson is a fraud."

Expensive medical bills related to her parents' critical injuries was cited as a reason for delaying DNA testing.

According to the newspaper, in 1991, Paramilitary Operations Officer Billy Waugh led an investigative team to Ngoc and was able to retrieve his DNA.

"[6] In response to the controversy, the GI Film Festival, which exhibited Unclaimed after the Toronto premier, posted a disclaimer on its site.

"[3] Jorgensen did confirm to Maclean's magazine, however, he believes "the circumstantial evidence strongly indicates this man is John Hartley Robertson.

One cannot, by testing only one tooth, eliminate the possibility the man in the movie was moved around as a child and the isotope levels represent an "average", which just happen to correspond to some place in the U.S., an area with very diverse geography where one is likely to find a match within error bars.

"[13] Linda Barnard, who covered Unclaimed in the Toronto Star,[3][4] also reviewed the documentary, "Canadian director Michael Jorgensen’s emotional story... seems unbelievable.

To the filmmaker's credit, Jorgensen lets the audience decide whether or not to believe it as he follows Vietnam vet Tom Faunce’s quest to make good on a pledge to leave no man behind.

Martin Tsai of the LA Times notes "Michael Jorgensen ... doesn't do serious investigative work to check [Ngoc's] claim that he's John Hartley Robertson".

[15] The Hollywood Reporter assess the film's commercial potential as "slim for a doc that ... seemingly has little interest in uncovering the truth.