A judge violates a ex parte in sons case for 3rd OUI and a possesion of Tylenol.

My son is being charged with 3rd offense OUI and possession of Tylenol 4. Was late for a hearing and judge gave his public offender until 4:30 to get him there. Was there at 1 and was advised that in the mean time Paynet **** enforcement team came in and talked to the judge and wanted him put back in jail. He wasn't cooperating with them; in other words he didn't rat people out like they wanted.  We were advised that the judge violated a ex parte and the judge was on the bench during the hearing and he admitted to that. My son's bond was upped and he was put in jail. What can we do? Want to fire his attorney and hire a new one.