Out Of Control Son

I have a 16 yearold son who is going on 17 in the next few monthes. In the last 7 years of our lives there have been many changes. First his mother and I split up and divorced in 05 and after my second marriage failed in 08 things just seemed to get worse. This last year his mother moved to Ark. In December before Christmas. Leaving him and his sister behind for me to take care of that was and always has been fine with me. But we then moved to AZ. In Jan. For my employment leaving behind everything we all have ever known. Over the last 4 monthea he has changed into someone I really don't even know he wont come home on time. He has Reyes to hit me a few times he is very disrespectful not just to me but also to his sister. And it all started after he met his girlfriend. I have had talks with him told him we were going to move back to CA or he would have to move to his mothers in Ark because he can't stay here along. He says he will run away if I take him back to CA or if I send him to his mothers. I am lost on what to do I have even gone as far as telling him if he ran away he would be put in jail he don't care at all. Help please.