Welcome, Ivory67. First start keeping a journal and write down everything that your son says relating to his past life or lives. As time goes on you may be able to do some research. See if you can get him to tell you what his name was, name of the town, etc. Have you read the book "Soul Survivor"? It's about Jame Leninger who remembers being a World War II pilot shot down in 1945. Carol is the one who advised his parents on what to do when he was having nightmares.