Unfortunately, the only person you can count on is yourself in this world. There are all types of covert programs and methods being used by evil people. You can use a Trifield EMF Meter to detect transmissions in your home to do your own surveillance. I would say use any means possible since it is to protect a child. With her consent she can use a recording device as simple as an android app on her phone, Failure to do something in those circumstances is not an option. If he is skilled in mind control, he is probably highly connected so the authorities often will not help you.
This is a crazy world and you must fight for your own protection by any means necessary. The internet currently has all the information you might need to inform and protect yourself. Anyone using hypnosis or mind programming should be considered extremely dangerous. It's very hard to find someone you can trust to help you because evil sticks together.