> I.e. the ICE agents showed up in the middle of a court proceeding, and the judge said they'd need to get permission from the chief judge before they could interrupt proceedings. The judge then didn't stop the defendant from leaving once the proceeding was done.

Do you have any evidence of this claim? The FBI affidavit says they were waiting in the public hallway outside, let the bailiff know what they were doing and did not enter the courtroom. The judge did not find out until a public defender took pictures of the arrest team and brought it to the attention of the judge. Maybe the FBI lied, but that seems unlikely given the facts would seem eventually verifiable by security video and uninvolved witness statements.

  Members of the arrest team reported the following events after Judge DUGAN 
  learned of their presence and left the bench. Judge DUGAN and Judge A, who 
  were both wearing judicial robes, approached members of the arrest team in 
  the public hallway.

https://storage.courtlistener.com/recap/gov.uscourts.wied.11...