George Nader, a key witness in special counsel Robert Mueller’s probe, has been charged in a new federal indictment with transporting a 14-year-old boy for sex two decades ago, child pornography and carrying obscene materials into the United States.

The new charges against Nader, a 60-year-old Middle East power broker, were revealed Friday in U.S. District Court for the Eastern District of Virginia.

Nader — who has been an advisor to Crown Prince Mohammed bin Zayed Al-Nahyan of the United Arab Emirates — already was being held in jail without bail after his arrest at a New York City airport in early June on a charge of transporting child pornography.

The charge used to arrest Nader at that time was based on an allegation his iPhone contained images of minors engaged in sexually explicit conduct when he flew into Washington Dulles International Airport in January 2018.

That same allegation is contained in the new indictment charging him with transportation of visual depictions of minors, as well as another count accusing him of importation or transportation of obscene materials.

The third count accuses Nader of knowingly transporting a 14-year-old boy from Europe to Washington Dulles Airport in February 2000 and then allegedly engaging in sexual acts with that child after taking him to Nader’s home in Washington.

The boy was from the Czech Republic, a prosecutor reportedly said at Nader’s arraignment on Friday.