How do I get rid of this guy?

I'm not in the habit of dating losers, but made the mistake of dating this one (for about 3 months). He lied (A LOOOOT), stole from me, was controlling, negative, mean, and forceful. He even forced sex on me once. He was a drug addict and never wanted to do anything the right way as if being honest/good was for suckers. I felt I needed to ease away from him (cause he was cra-zy) until I learned I was pregnant. I got away immediately and haven't looked back. The day I left, he threatened my life so I filed an exparte and it still hasn't been served but he learned about it because the police left a note on my door about it (which seems completely illogical.) He'll call several times a day just a few minutes apart, text 15 times in a row, etc. I haven't talked to him in months, but he DEMANDS to know what I want to do with our "relationship". He's said he'd leave many times but hasn't. I told him to go many times before, but he hasn't. He says if I don't want him he'll sign over his rights to the baby, and I hope that's true because he REALLY doesn't need to influence a young mind. I found him to be one of the worst people I've ever met and dangerous. He admitted to committing a lot of violent crimes to me and treated me and others around me just awfully. Since I've been gone, most of his texts/emails/voicemails are so doggone positive and loving that I can't really use them as evidence. He knows what he's doing and still comes around my house. What can I do?