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How was he vindictive?
How long were you married?
How old are the two of you?
How is he harassing you?
He sounds very dangerous and even though you have moved out of state he still seems to be fixated on you. It's possible that he filed for divorce he may have thought you wouldn't go through with it. At this point I would change your number, be sure that he doesn't have your new address and if he continues, consider filing a restraining order.
I welcome your thoughts, let me know if you want to talk more