The Dutch attorney pleaded guilty in February to lying to federal agents, and U.S. District Court Judge Amy Berman Jackson sentenced him on April 3.
On Tuesday, Jackson said she recognized that van der Zwaan has been away from his family for months, during which his wife is going through a hard pregnancy. Late Monday night, Mueller said in a court filing that a separate memo from Deputy Attorney General Rod Rosenstein specifically detailed his mandate, and he's consulted with Rosenstein over the course of the investigation.
Unlike other defendants in the Russian Federation investigation, van der Zwaan has not entered into a cooperation deal with Mueller's office. "I apologize to the court, my wife and my family", he told the judge. "It was more than a lapse or misguided moment", Jackson said. Manafort has pleaded not guilty and denied any wrongdoing related to Russian election interference.
People can't lie to prosecutors and get away with it, Weissmann added.
Van der Zwaan was given the first sentence in Mueller's investigation into Russian meddling and potential collusion with Trump campaign associates during the 2016 presidential election.
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It remains unclear whether van der Zwaan has information about Manafort and Gates' activities during the 2016 campaign. Van der Zwaan had also been accused of lying about an email exchange between himself and someone called "Person A" who remains unidentified.
"This is not an isolated incident of simply making one bad decision", Weissmann told the judge Tuesday.
Van der Zwaan had faced a maximum of five years in prison and a quarter-million-dollar fine for lying to investigators, though federal recommendations had put his likely sentence between zero and six months. The couple is expecting their first child in August after a "difficult" pregnancy, a factor his defense argued in requestion leniency from the court. The special counsel has already heard Nader's testimony on a meeting he had in Seychelles with a Russian executive linked to Russian President Vladimir Putin and Erik Prince, a top Republican donor tied to the Trump transition team, just weeks before Trump's inauguration.
Skadden, a powerful NY law firm, has said it fired Van Der Zwaan a year ago and is cooperating with the investigation.
His lawyer, William Schwartz, asserted that van der Zwann worked to correct the record with the special counsel because he realized that he had made a "terrible mistake".