I can’t even imagine how this could happen? Who convinced a 4 year old kid that he was someone else? How did his parents not recognize that it wasn’t the same kid - unless they were doppelgangers (and even if they were), it’s pretty hard to convince someone that a child is theirs if he isn’t! We’re not talking the difference between a 9 month old and a 10 year old - based on the dates, he was found not too long after the other kid was kidnapped.
At least the guy didn’t sit in jail for years because of it.