Welcome!

I agree with both SweetCrusader and Dexter. Keep everything (emails, notes, letters to third parties - if you can get your hands on them, save voice mail messages) and document everything - whom you have spoken with about this guy, when, where, who said what, etc. Should he call and you pick up the phone, hang up immediately. This is definately harassment, with or without that phone call.

I am not a doctor either, but from what I read, my first instinct is that the guy might not only have delusions, but also Borderline Personality Disorder. An issue with those who have BPD sometimes have 'relationship' issues. This means that if Person A does something 'nice' to him, then Person A is 'saint'; however, if Person A does something he believes to be 'negative' to him, than Person A is 'very bad' and deserves 'punishment'. He would do just about anything to get his way. I think it's more of a control thing. With that said, I can be totally wrong. I'm going with what you've said and my own knowledge and experiences.

BTW - is he doing the same thing to your friends or even family members as he's doing to you?

I would certainly talk to the police, lawyer, and psychologist about this - as Dexter suggested. Having those people know about your situation is not only proactive, but it may also give you a tiny bit peace of mind. The letters and threats may sound too 'crazy' to be believed, but they are serious.

Good luck. Please becareful and take care of yourself. Also, let us know what happens.