Newt Gingrich called for Special Counsel Robert Mueller to release the tape of his team's extensive interviews with Michael Cohen.

Mueller's investigators reportedly spent more than 70 hours interviewing Cohen, President Trump's former attorney and self-described "fixer" who was sentenced to three years in prison Wednesday.

Cohen pleaded guilty in a federal court in New York to tax evasion, campaign finance violations and lying to Congress about a Trump real estate project in Russia.

"They ought to release the 70 hours of tape of their interviews with Cohen," Gingrich said on "Fox & Friends." "They've been using very strange prosecutorial tactics."

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He said that Mueller's team has attempted to put the squeeze on multiple Trump associates in the Russia probe, including keeping Trump's former campaign Paul Manafort in solitary confinement.

"Basically saying, 'You get to come out of solitary when you tell us the story we like,'" Gingrich said. "They listened to Cohen for 70 hours. I'd like to know what they said to him. I'd like to know how many different stories he told until he finally got to the one that Mueller liked."

He said that prosecutors have enormous power, and they can "brutalize and demonize" someone until they get the desired result.

"I have a simple test for them: Release the 70 hours of tape of Cohen's interviews. Let the country judge which story is really true and what you did to get him to say something."

Watch the full "Fox & Friends" interview below.

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