Nicholas Barclay disappeared in San Antonio, TX. Three years later he was found in Spain, but was this the real Nicholas?
Sources:
The Imposter
60 Minutes Australia: Mystery of Missing Boy Nicholas Barclay and his Imposter Frederic Bourdin
The Nicholas Barclay Disappearance And Ensuing Deception | Missing | Investigation Discovery
Frédéric Bourdin - Wikipedia
Nicholas Patrick Barclay – The Charley Project
Interview: The private detective who uncovered The Imposter (scotsman.com)
The Mystery Of Nicholas Barclay And His Imposter, Frédéric Bourdin (allthatsinteresting.com)
Justice for Nicholas Barclay - The CrimeWire
The Chameleon | The New Yorker
Frederic Bourdin: The Crazy True Story Of A Serial Impostor (grunge.com)