The indictment was unsealed in the US District Court for the Southern District of New York. The US Department of Justice alleged that Yadav was a co-conspirator of 53-year-old Nikhil Gupta, who was previously charged. Earlier in June, Gupta was extradited from the Czech Republic to the US to stand trial, where he pleaded 'not guilty.' "The Justice Department will be relentless in holding accountable any person - regardless of their position or proximity to power - who seeks to harm and silence American citizens," said Attorney General Merrick B Garland.