It may sound strange but one thing you should do is go by where they live and take pictures of his living situation so you have proof he is in a bad home. The court will not just hand him over because you want him you need proof. A man I know did this and it helped out so much he actually had a poster board of pictures he had taken of the trashy people coming in and out of his daughters house he even had recordings of conversations he had with the mother. Now he has custody of his daughter. the fact that he failed will actually help you out and take him to the dentist so that you can find out the extent of the damage to his teeth, get as much physical proof as you can.