In "The Shell Game" by Scott Bennett, he says he sent copies to Mattis
>On memorial day, May 27, 2013, Bennett submitted an 83 page "whistleblowing report to the United States Congress". It was entitled "Shell Game: The Betrayal and Cover-up by the U.S. Government of the Union Bank of Switzerland-Terrorist Threat Finance Connection to Booz Allen Hamilton and U.S. Central Command".
https://archive.org/stream/pdfy-nuxY0nNOAtmL3H70/Shell%20Game_djvu.txt