A German newspaper, Sueddeutsche Zeitung, reports that a Volkswagen whistleblower is now suing the German automaker, alleging he was fired after trying to stop the company from deleting evidence related to the EPA's investigation into the diesel emissions scandal.

The employee, who reportedly worked for a data center in Michigan, says that Volkswagen had continued to delete data despite an order from the U.S. Department of Justice to stop such deletions of electronic records.

The suit maintains that VW had justified the deletions internally due to a "lack of storage space."

Forture reports that the employee claims that the VW's’s IT division had refused to allow Jones Day, the law firm engaged by the VW board to investigate the affair, full and free access the company’s systems.

The lawsuit filed was on March 7, two days before Volkswagen CEO Michael Horn's abrupt resignation.

Volkswagen's sales have been hit hard by the emissions scandal, with the automaker reporting a drop of 7.2% for U.S. sales, and a 1.2% decline worldwide.