eeks this has gotten ugly and dangerous. The most important thing is for you to be safe no matter what. He is no longer trustworthy if he was willing to get violent.

If you contacted your lease holder they would effict him since he is not on the lease. I would buy him a one way non refundable ticket home to Wyoming just to get rid of him. I would put new locks on the doors and invite a big strong male friend to stay with me until I found a new place to live. I would get a new unlisted phone number and cut off all contact with him. I would get a restraining order. I wouldn't take his violence lightly. He would know I was serious about going separate ways.