I ended up being the one who left. I could have gone through a bunch of paperwork and rigamorale and tried to get him removed, but really it was easier for me just to leave with the kids. He owned the house and it just wasn't worth the trouble, being in a terrible neighborhood and one step away from being condemned. I understand that this isn't an option for everyone.
Do you have a safe place to go? He sounds scary and unstable and quite frankly mentally ill to me.
Which leads me to another thought. Is there a way to have him involuntarily committed for a 72 hr psych hold? That would give you a few days to sort things out. I know this is different in some states than others. You could say he cleaned out the accounts and has been acting irrational and that you are afraid for your family's safety. Some places that might be enough.