Even if the lawfag is correct - it just means Durham's investigation won't charge Brennan. As anons already stated there's military tribunals. ALSO either Huber and/or Bash could charge Brennan - and/or any other USATTY that may be working on cases. BUt I like the perjury trap too.
Has anybody checked for steganography?
Thinking maybe the obvious message to be decoded isn't in the square patterns but behind them. Also, very linear thinking regards rows and columns could be serial, backwards or wrap-around (circular/mobius).