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Alan Dershowitz on Monday slammed James Comey for leaking memos of his private discussions with President Trump.

Dershowitz, a Harvard Law professor emeritus, said the former FBI director "demeaned" the bureau by giving the memos to a law professor who then leaked the content of the memos to the New York Times.

"This is a man without courage," Dershowitz stated on "Fox & Friends."

He argued that Comey should have spoken up when Trump allegedly pressured him to end the FBI’s investigation into former national security adviser Michael Flynn, and also when the president allegedly demanded Comey's loyalty.

"Instead, he leaked it," Dershowitz said.

Dershowitz's comments came after Comey's interview on ABC Sunday night, ahead of the release of his tell-all book Tuesday.

Comey admitted last year that he'd given Columbia University law professor Daniel Richman his memos about conversations with Trump to have the notes leaked to the Times.

He had told officials upon admitting of the leak, "I asked a friend of mine to share the content of the memo with a reporter—I thought that might prompt the appointment of special counsel.”

Richman told Fox News that he had received four memos from Comey, but also said that none of them were marked as classified.

A report by The Hill had said that "more than half" the memos written were "determined to contain classified information.

"When [Comey] was in the presence of the president, he showed no courage," Dershowitz said.

He said that as someone who was the head of the FBI, Comey should have looked Trump in the eye and said, "You're wrong."

Watch more from "Fox & Friends" above.

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