The evidence Huber possesses is so damning he doesn't need to utter a single word to that treasonous snake to obtain an indictment. Testementary evidence is also subject to the 5A. All he'd do is take the Fifth. This is a big, fat fucking piece of nothing.
Build a rock solid case then kick it to the US Attorneys for the respective jurisdictions. Ensure the USAs are not comped. I'm sure there's a correlation between the amount of sealed actions in a district and the US Attorney overseeing it. It's already clear that the majority of the sealed actions are in jurisdictions that cover respective state capitals. Would have to dig on the US Attorneys, see where their loyalties lie. Then again, Huber was first appointed by Hussein. So who the hell knows. Dem appointees aren't necessarily evil fucks by default.