Where did you read that?
If it's true, the only possible thing I can think is that he gave up lots of names and details. But the question is whether these will actually ever be used to get other prosecutions and convictions. Probably not.
Well, if you do a google news search of berger+jail, you will see this link there. Looking at it now, it makes no sense. It's dated Aug 7 but speaks to something that will occur in the past ( July 8 ). I suggest you don't click on the link, it nearly wrecked my computer.