Washington (CNN) A juror from the Paul Manafort trial said she believes it would be a "grave mistake" if President Donald Trump were to pardon his former campaign chairman.

When asked by CNN's Anderson Cooper why she thought it would be a mistake, Paula Duncan, a Trump supporter, said, "Justice was done."

"I feel it would be grave mistake for President Trump to pardon Paul Manafort," Duncan said during an interview that will air on CNN's "Anderson Cooper 360" Friday at 8 p.m. ET.

"Justice was done, the evidence was there and that's where it should stop," she added.

Duncan was one of the 11 jurors who were in favor of convicting Manafort on all 18 counts against him. In the end he was convicted of eight, with the jury hung 11-1 on the other 10.

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