There’s a guy who thinks he might be Paul Fronczak, who was abducted from a hospital in 1964 at only one day old.
Sam Miller was allegedly born to a Chicago teenage mother named Sheila Kohn, but he hasn’t been able to locate her and thinks, if Sheila is in fact his biological mother, she used an alias. He’s got a pretty strong motivation to find his biological family, whoever they are: he needs a kidney.
I don’t know why they can’t just do a blood test or a DNA test or whatever to see if he’s related to Paul’s parents, who are, I believe, still alive. I’m not holding my breath here; I’ve seen so many cases where someone thought he was a missing child and it turned out he wasn’t.