Really strange people in this world: The Imposter

It's by no means a great film, but the recent (2012?) documentary The Imposter will keep you thinking and will stay with you after the film is over, as the incident it examines is full of mystery and unanswered questions. Briefly: in about 1994 a 14-year-old boy disappears from his Texas family and is never found and presumed dead; in 1997, a boy turns up in France who claims to be this Texas kid, and the authorities send him back to the family. He claims to have no memory of his childhood etc., but the family takes him in - even though it's increasingly obvious that the kid is an imposter. That's all I'll give away, but suffice it to say that by the end of the movie you feel that everyone involved is guilty of something, stupidity and gullibility at the very least and possibly much worse. The filmmakers to a good job in telling the story, but I have to say as a documentary it's pretty thin gruel: everything in the movie except contemporary interviews with three of the family members is recreated or, in a few brief instances, pulled from news video. I know this is the documentary style pioneered by The Thin Blue Line, but with so many recent documentaries doing great work with uncovered old footage and video, this movie feels a little quaint and old-fashioned, not as vivid and real as some recent great ones such as the unforgettable Sundance series The Staircase. Worth seeing anyway for its provocative value - there are really strange people in this world, as The Imposter makes clear.