Following Acting Attorney General Matthew Whitaker's comment that the Mueller probe is "close to being completed," former federal prosecutor Andrew McCarthy said, "I would not be holding my breath."

Whitaker's remarks came just days after Special Counsel Robert Mueller ordered the dramatic predawn arrest of former Trump adviser Roger Stone on charges he allegedly lied to Congress and directed another witness to do the same.

"I’ve been fully briefed, and I look forward to Mueller delivering the final report," Whitaker said Monday in his first question-and-answer session with reporters since becoming acting attorney general last November. “Right now, the investigation is, I think, close to being completed. And I hope that we can get the report from Director Mueller as soon as possible.”

On "Fox & Friends" Thursday, McCarthy said "close to" is a relative term.

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He said there have been signs for some time that the probe is "winding down," noting that Mueller is allowing defendants to be sentenced, he's staffing down a bit, and he has transferred a number of cases to other components of the Justice Department.

"There have been a lot of indications that this is winding down, but winding down doesn't mean this will be over tomorrow or next week," McCarthy said.

He explained that Stone -- who was just indicted and arrested several days ago -- has said he wants a trial.

"That, by itself, would take a few months," McCarthy said. "So I would not be holding my breath for this to be over, but I do think we're in the last stages of it."

Watch the clip above, and see more from McCarthy on the Stone indictment below.

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