Undercover FBI informant William Campbell has given written testimony to Congressional investigators after an "iron clad" gag order was lifted in October

Campbell was a highly valued CIA and FBI asset deeply embedded in the Russian nuclear industry while Robert Mueller was the Director of the FBI

Campbell was required by the Russians, under threat, to launder large sums of money - which allowed the FBI to uncover a massive Russian "nuclear money laundering apparatus"

He collected over 5,000 documents and briefs over a six year period, some of which detail efforts by Moscow to route money to the Clinton Foundation

Campbell claims to have video evidence of bribe money related to the Uranium One deal being stuffed into suitcases.

The Obama FBI knew about the bribery scheme, yet the administration still approved the Uranium One deal.

To thank him for his service, Campbell was paid $51,000 by FBI officials at a 2016 celebration dinner in Chrystal City