Well, I have had memories that werent mine my whole life. It was much stronger and easier to remember when I was a child. As I grew up I lost touch with it all together for a while, almost like it had been nothing more than a dream. I feal sorry for this boy. At that age one should not have to bare wittness to things that are hard to stomache even for adults.
I personaly believe there is some truth to reincarnation, but I dont think its an absolute. It happens to some, and others are born of a new soul I guess.