T.D.
I firmly believe children see these types of things and as an adult it can seem scary. I do not have any experience but do know of a psychic that I myself have to spoke to before and he is very reputable. Have you ever heard of Gary Spivey? He has a website too. I believe it is garyspivey.com. He made some predictions about me having my children that he hit right on the nail. He has spoke of children seeing spirits before. Maybe you can find some help on his website. Best wishes and love & encourage your son. This is what make our children special in their OWN ways. Good luck!