oh gosh. I hope they picked him up and you are ok. Maybe a no contact order is in order? Even a temporary one for now would be better than nothing. I once moved the lock/knob from the back door to the front and vise/versa. It didn't involve changing the locks, but it was confusing enough for my A that he thought I did. Maybe an idea? I have so been there, what you are going through makes my stomach turn and takes me back in my mind to such a dark place. I hope you are okay today, please let us know when you can.
M