A fair and good question.
Here is my guess: they insiders didn't have the rock solid evidence that they now hold. 650,000 e-mails on a laptop. As Trump said on Monday, that is the mother load.
If what Dr. Pieczenik is saying is true, the Intelligence community (and probably the NYPD and the FBI) have the Clintons and many, many others by the balls.
Sounds reasonable. Then it also means Klownie the Kenyan really has everything locked up in that law firm’s vault.