Mr Greenberg was indicted last summer on various charges, including sex trafficking of a minor. He has denied the charges and is due to go on trial in June.
Mr Gaetz has not been charged with a crime. The congressman claimed in interviews with US news outlets that the allegations were part of an extortion plot by a former Department of Justice official.
“I have a suspicion that someone is trying to recategorise my generosity to ex-girlfriends as something more untoward,” Mr Gaetz told the New York Times.
He called the allegation that he had travelled with a 17-year-old girl “verifiably false”.
Mr Gaetz said his family has been cooperating with the FBI and that he and his father had been wearing a recording device at the bureau’s request “to catch these criminals.”
“Over the past several weeks my family and I have been victims of an organised criminal extortion involving a former DOJ official seeking $25 million while threatening to smear my name,” he said in a statement.
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