You might remember the news from a few years ago when a young boy recalled being a fighter pilot who was killed in WWII.
Jim Tucker, a Psychiatrist and head of the Department of Perceptual Studies at UVA investigated it and wrote a book on it. It was well documented as accurate.
Jim tested the young boy in several ways and he passed, including giving his buddies name, the ship name, how he died, the details on his corsair....
I think this is the story:
https://www.amazon.com/Soul-Survivor-Reincarnation-World-Fighter/dp/0446509345