Do you remember being born? I do

It would make an interesting case study to examine him neuropsychologically. I am not willing to believe such claims at face value, but there are people with interesting physiological capabilities, like the woman who can smell cancer. Studying someone like him, if he’s telling the truth, would probably help researchers understand something fundamental about long term memory formation and maintenance.

I consider that some Near Death Experiences may be latent memories of the individual's birth... https://www.nderf.org/Archives/NDERF_NDEs.html

False memories are incredibly easy to induce in kids, but the opposite is also true. I've found with my kids if I periodically and repeatedly ask about events that occured before they could even talk it cements those memories more completely than you'd think. They'll bring up aspects of the event that I didn't lead them into, sometimes things I myself had all but forgotten.

It doesn't seem unreasonable to me that given the perfect storm of reinforcement that a person could remember certain events from what would normally fall into the infantile amnesia period.

I think the earliest anyones walked is 7 months.