The Affidavit in support of the Criminal Complaint:
https://static.foxnews.com/foxnews.com/content/uploads/2023/04/affid.pdf
He was using his security clearance to monitor the investigation into his crimes.
"Accordingly, there is reason to believe that TEIXEIRA was searching for classified reporting regarding the U.S. Intelligence Community’s assessment of the identity of the individual who
transmitted classified national defense information, to include the Government Document. "