U.S. Postal Service investigators found no evidence to support one Pennsylvania USPS employee’s claim that he heard his superiors discuss tampering with mail-in ballots.

Richard Hopkins, identified as a U.S. Postal Service employee in Erie who signed a sworn affidavit claiming postal supervisory officials hatched a plan to backdate ballots mailed after the election, later recanted his story to investigators, according to the Postal Service’s inspector general.