A top prosecutor investigating Russian interference in the 2016 presidential election and possible ties between President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's campaign and Moscow is reportedly leaving special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's office and the Department of Justice.

NPR first reported reported Thursday that Andrew Weissmann will teach at New York University and work on public service projects.

Peter Carr, a spokesman for the special counsel's office, told The Hill in an email: "Andrew Weissmann will be concluding his detail to the Special Counsel’s Office in the near future."

Carr declined to comment further on the details of Weissmann's departure.

NPR reported that the departure is a sign that Mueller and his team are nearing the end of their work.

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Weissmann, a top lieutenant to Mueller in the probe, took the lead in the case against former Trump campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE. Manafort faces 7 1/2 years in prison after he was sentenced by a federal judge in Virginia last week and a federal judge in Washington, D.C., on Wednesday.

Trump has long decried the special counsel's investigation, often calling it a "witch hunt" and maintaining that his campaign did not collude with Russia.

The special counsel has indicted, convicted or secured guilty pleas from several of Trump's former associates, including Manafort, informal Trump adviser Roger Stone Roger Jason StoneThe agony of justice Our Constitution is under attack by Attorney General William Barr Justice IG investigating Stone sentencing: report MORE, Trump's former personal attorney Michael Cohen Michael Dean CohenA huge deal for campaign disclosure: Trump's tax records for Biden's medical records Our Constitution is under attack by Attorney General William Barr Eric Trump says he will comply with New York AG's subpoena only after Election Day MORE and former deputy Trump campaign manager Richard Gates.

NPR noted that Weissmann's departure comes after a top FBI agent in the investigation, David Archey, left the special counsel's office earlier this month to start a new job in Richmond, Va. Multiple other prosecutors have also left the office in recent months, including Scott Meisler, Kyle Freeny and Brandon Van Grack.

Additionally, NPR reported that WilmerHale, the firm that Mueller and multiple other prosecutors left to join the special counsel, is expecting the return of some of its ex-partners.

Excluding Mueller, the special counsel's office now has 12 attorneys on staff.

At NYU, Weissmann — who years ago was part of the federal task force that investigated Enron — is expected to work on improving forensic science standards used in courts in an effort to reduce wrongful convictions, according to the network.

Updated at 11:32 a.m.