From the Document: "[E]mployees in the Transportation Security Administration's (TSA) Office of Security Capabilities (OSC) were given internal guidance that, if followed, would improperly restrict and delay the DHS Office of Inspector General's (OIG) access to documents. Specifically, on October 3, 2016, 'TSA HQ [Headquarters] - Executive Advisor' sent a communication to TSA's OSC setting out instructions for interacting with the OIG. The email notifies TSA personnel that documents responsive to an OIG request must first be 'cleared' within TSA before being provided to the OIG. The email also states that, prior to production to the OIG, documents are to be subjected to multiple levels of review within TSA, including review by a Designated Program Office, the OSC Audit Liaison Team, the Office of Chief Counsel (OCC), and TSA leadership."
Department of Homeland Security, Office of Inspector General, Report No. OIG-17-45-MA
Department of Homeland Security Office of Inspector General: https://www.oig.dhs.gov/