I am concerned for YOU!!!!!!
Under no circumstances should you ever allow ANYONE hit, bite, beat the crap out of you. Even your child. It is not good for him or for you.
I'll read your back story, but you are being abused by your son and his "revertion back to his old ways of violently attacking me".
This is very scary stuff. What has happened to your mindset that you are minimizing this? Calling his counselor to stop his dad's future visits seems like the least of what is going on.
Maybe you need to talk with the domestic violence people right now and figure out what to do with your son. I don't mean this to sound harsh, but what you've written reads like a crisis going on right now.
Please come back and tell us more about what is happening in your home and life. We're here to support you.
ShootingStar1