Here's my situation, I came from an abusive both physically and verbally relationship. Our divorce was final in March and I have a 14 month old son with my ex. We have joint physical/legal custody of our son, and I've recently been finding out that I no longer know where he resides, where he takes my son or who my son is with. He lies to me frequently. I discovered that he moved, but he has yet to tell me, if I bring it up he yells at me and threatens to take my son. We don't have a good line of communication regarding my son, so I really don't know anything when he has him. How much information am I legally obligated to?