And now he is suing former FBI Director James Comey and other government figures, alleging the bureau has covered up evidence he provided them showing widespread spying on Americans that violated civil liberties.

The suit, filed late Monday night by Dennis Montgomery, was assigned to the same federal judge who has already ruled that some of the NSA's collection of data on Americans violates the U.S. Constitution's Fourth Amendment, setting up an intriguing legal proceeding in the nation's capital this summer.

Montgomery says the evidence he gave to the FBI chronicle the warrantless collection of phone, financial and personal data and the unmasking of identities in spy data about millions of Americans,.