An employee of a Department of Defense intelligence agency has been accused of compromising a computer program that was being used in a joint FBI-U.S. Army terrorist investigation while working at Fort Belvoir.

Brian Keith Montgomery was an analyst for the National Geospatial-Intelligence Agency when he used his top-secret clearance to gain access to a computer program he was not cleared to view, charging documents filed in Alexandria’s federal court said. Court records did not list an attorney for Montgomery.