The Imposter features Frédéric Bourdin, Carey Gibson, Beverly Dollarhide and Nancy Fisher; Bart Layton directs. Filmmaker Bart Layton’s 2012 documentary The Imposter tells an almost unbelievable story about a Texas family that embraced the brown-haired, brown-eyed 23-year-old Frenchman who claimed to be their missing blond, blue-eyed American teenaged son. In…