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If the Judge was bought, then your daughter needs to file complaint against the Judge with Judicial Conduct Commission. The Judge supposed to make a decision based on what is in the best interest of the child and not because he was bought off by one of the litigants. This is a very serious charge. If the Judge was indeed paid off, the Judge could be removed from the bench. You can click on the link below to learn about the complaint process
In the meantime, your daughter needs to file Complaint for Modification of Custody and request that Court give her full Custody. She needs to state her reasons for her request just as you did in your narrative here. If the Court assigns her to the same Judge, she should file a Motion to Recuse the Judge due to bias. The forms for filing the Complaint and the Motion are available at the Courthouse in the Clerk's Office.