The U.S. Department of Justice has asked a federal judge to vacate court decisions that previously quashed subpoenas in a criminal investigation targeting Federal Reserve Chair Jerome Powell.

U.S. Attorney Jeanine Pirro for the District of Columbia filed the request Monday, arguing that the earlier court rulings are now "moot" following the closure of the investigation. Pirro announced late last month that the DOJ was ending its probe into Powell.

The request relates to two subpoenas that were part of the criminal investigation. A court had previously decided to quash these subpoenas, but with the investigation now closed, prosecutors are seeking to have those judicial decisions formally vacated.

The nature and scope of the original criminal investigation into the Federal Reserve Chair have not been fully disclosed. The DOJ's decision to close the probe and subsequently seek vacation of the subpoena rulings suggests the matter has been resolved without charges being filed.

Pirro's motion represents a procedural step to clear the judicial record following the conclusion of the investigation. Federal courts typically consider such requests when the underlying legal issues that prompted earlier rulings are no longer active or relevant.