A former member of the FBI's top brass in its New York office blasted Sen. Kirsten Gillibrand and other Democrats who have repeatedly called for an "FBI investigation" of Judge Brett Kavanaugh.

Gillibrand, a New York Democrat, said Kavanaugh's Fox News interview is not enough to clear him of sexual misconduct allegations by Christine Blasey Ford -- and that the Supreme Court nominee should demand the FBI investigate Ford's claims.

"If he's willing to talk to Fox News about his views, I don't know why he's unwilling to talk to the FBI... A fair hearing means you have an FBI that investigates the facts," Gillibrand told CNN.

The senator, who is up for reelection in November against Republican Chele Farley, has indicated she will vote against Kavanaugh's nomination.

Bill Gavin, the former assistant director of the FBI in the Empire State, blasted Gillibrand's understanding of the bureau's duties and abilities.

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"How anybody that's allegedly educated and worked themselves into the position of being a senator can have such an inane assumption is crazy," Gavin said. 

Gavin said the FBI has neither the jurisdiction nor forensics to examine.

He said Ford has not filed a complaint with local authorities in Maryland -- where the FBI would start an investigation.

"There is nothing for the FBI to go look at from a forensic point of view," he said.

He said that there should be, however, an investigation of why Sen. Dianne Feinstein (D-Calif.) sat on the allegations for more than a month, then redacted part of the documentation -- in such a way that, Gavin said, seemed designed to help her cause politically.

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