(…) “In March of 2016, NSA Director Rogers became aware of improper access to raw FISA data (Page 83 of Court Ruling).
In April of 2016, Rogers directed the NSA’s Office of Compliance to conduct a “fundamental baseline review of compliance associated with 702” (Senate testimony & Page 83-84 of Court Ruling).
On April 18, 2016, Rogers shut down all outside contractor access to raw FISA information – specifically outside contractors working for the FBI. The discovery that outside contractors were accessing raw FISA data is probably the event that precipitated Rogers ordering a full compliance review (Page 84 of Court Ruling).
On April 18, 2016, both the FBI and DOJ’s NSD become aware of Rogers’ compliance review. They may have known earlier but they were certainly aware after outside contractor access was halted. (Read more: themarketswork.com, 4/05/2018)