On March 9, 2016, oversight personnel doing a review of FBI system access were alerted to thousands of unauthorized search queries of specific U.S. persons within the NSA database.
NSA Director Admiral Mike Rogers was made aware.
Subsequently NSA Director Rogers initiated a full compliance review of the system to identify who was doing the searches; & what searches were being conducted.
On April 18, 2016, following the preliminary audit results, Director Rogers shut down all FBI contractor access to the database after he learned FISA-702 “about”(17) and “to/from”(16) search queries were being done without authorization. Thus begins the first discovery of a much bigger background story.