M.C.
You have a stalker on your hands. Contact your local police and ask them how they handle this. They can give the best advice. You may have to get a restraining order served on him as well. In the meantime, this guy sounds like a real drugged out nutcase. I would make everyone including your kids, family, friends, neighbors, aware of this dangerous situation. Would you be willing to learn how to use a gun? You should probably look into it. Get a CCW license and carry a weapon with you. The problem with moving is that nowadays with computers, everyone is traceable in some way. You need to nip this in the bud--NOW before you or someone you love gets hurt.
M