The issue hear is way beyond the scope of the book and now the movie about Clinton cash. For one thing the FBI is said to have tracked each email back to the originator to determine the classification.
The money trails also had to be tracked and documented. When the FBI delivers the evidence I wouldn’t be surprised if it fills a large box truck, if not a tractor trailer.
Your faith in the system is far greater than mine.
Guilty as hell...free as a bird.