I do know that dolls were once used in voodoo and other religious ceremony in trapping the spirits of dead people. Because of dolls body are hollow. Other doll possession are sometime created by dead love ones who cherished the doll when they were alive. But in this case the doll witness an execution of a murderer. And murderer decided to possessed the doll as his new body. You'll will need to get a religious person to exorcized the doll from your house and child. Since the paranormal started when your child got the doll as a gift. That way it can't come back to harm your child.