Now, Nader on Friday was indicted on new charges of importing child pornography and traveling with a minor to engage in illegal sexual activity, Politico reports.

Some of the charges stem from a search of Nader's iPhones that was conducted in April 2018, when he was detained and questioned by agents on behalf of Mueller after arriving at Dulles Airport.

It's unclear what Nader told Mueller, though it's believed his testimony pertained to actions by Erik Prince, the Blackwater founder and brother of Betsy Devoes, who Mueller alleged met with an ally of Russian President Vladimir Putin in the Seychelles around the time of Trump's inauguration. It was alleged that Prince was trying to set up a "back channel" to Trump. Nader is allegedly an emissary of the UAE.

Soon after the images were discovered, prosecutors reportedly filed a criminal complaint against Nader over the images, but they kept the charges under seal, and Nader's lawyers were never informed of his impending arrest all the while that he continued to cooperate with the Mueller probe.