Au contraire, Trinity...look at 10(a):
"If the defendent pleads guilty to count one ...... the United States will not charge the defendent with additional crimes arising from the transactions currently known to the United States".
So in other words, anything that the DA or any other government body is already aware of in regard to criminal activity by JD is off limits for further action.
Seems they could have gotten him for a lot more than five years, which it seems will be reduced (guessing here) based on the reductions the government has agreed to accept.
Another case of Caveat Emptor to the little guy and the Big Guy not paying attention.....