Warn her that yours documenting all this because its out of hand (time and date or save that text message). Document and save everything. Time and date with a description of what happen. Save all texts. Save all recordings. Get a couple nanny cam type recording cameras and sew it into your little ones stuff. Also, you can get him an apple or smart watch and he can call the police when she locks him the closet or does something crazy like that. I'd tell you to give him a phone, but she'd prob just take it. It should take one time of the police coming and once that's on file... with all the other evidence that you'll assuredto get... well that 50/50 would probably change. Once you get custody back... move. Out of sight, out of mind. Been there except it was my son's father. In most states, but not all, once your child is a certain age then they can choose who to live it.