Richard Gates has hired a top white-collar attorney who was spotted at 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 twice over the past week, CNN reported Tuesday.

Gates, a former business associate of former Trump campaign head Paul Manafort Paul John ManafortBannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention Ukraine language in GOP platform underscores Trump tensions MORE, has been charged in Mueller’s probe into Russia's election interference. CNN reported that he recently added top D.C. defense attorney Tom Green to his legal team.

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According to CNN, Green was seen at Mueller’s office two times last week, suggesting that Gates might be in negotiations with the special counsel.

The network noted that Green is not listed as an attorney for Gates in the court records, and works for a law firm different from that of the rest of the lawyers on Gates’s team.

Green declined to comment to CNN, as did Gates's primary lawyers, citing the gag order on the case.

The Hill has reached out to the special counsel’s office for comment. A spokesperson for the office declined to comment to CNN.

Gates pleaded not guilty in October to eight charges in the probe, including money laundering. Manafort also pleaded not guilty to charges in the same case.

Mueller has filed charges against four figures tied to President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE in his probe. Former national security adviser Michael Flynn and former Trump campaign staffer George PapadopoulosGeorge Demetrios PapadopoulosTale of two FBI cases: Clinton got warned, Trump got investigated Trump says he would consider pardons for those implicated in Mueller investigation New FBI document confirms the Trump campaign was investigated without justification MORE have both pleaded guilty to charges from Mueller.

Both men are cooperating with the special counsel's office, and could be joined by Gates if he decides to strike a deal with the special counsel.

Gates's attorney Walter Mack said in court last month that federal prosecutors had warned him that more charges might be filed against Gates.

Gates was released from house arrest earlier this month.