I agree. That Bergler is offering to cooperate publicly and the feds have not even talked to him speaks volumes. I suspect too that there was some wiretapping going on after Bergler took them. This is going to be very interesting before it's all over.
I suspect the leak came from Bergler himself or those around him. The investigators have not even spoke with him yet. Bergler is trying to bring the investigation to a close faster than the Justice Deparment wants. Also, disclosure is better now than later in terms of the election.