Tyler Drumheller Was the Man Behind Hillary Clinton's Private Libya Intel, Sources Say

Sources say Tyler Drumheller provided the memos to Clinton.

“We have a CIA, so why would you not rely on your own, vetted, sourced intelligence agency?” Rep. Trey Gowdy (R-SC), the chairman of the House Select Committee on Benghazi, asked reporters Tuesday.

Sources close to the Benghazi investigation identified the official as Tyler Drumheller, a 25-year veteran of the CIA who retired from the agency in 2005 and has since worked in private consulting.

In 2011 and 2012, sources say Drumheller wrote two dozen memos regarding Libya and the Benghazi attack, mainly about the civil war.

Though Drumheller, 63, was not available to speak with ABC News and did not respond to requests for comment, public information and the memos sources say he composed provide insight into his background.

His wife declined to comment and he has not been accused of any wrongdoing.

A Bush Administration Critic (and Democratic Donor)

“Never before have I seen the manipulation of intelligence that has played out since Bush took office,” he told the German magazine Der Spiegel in 2007.

Clinton Valued His Intelligence (But Didn’t Always Agree With It)

Gowdy also had doubts about the information supplied by Drumheller.

“I wanted to probe the reliability, the efficacy, the credibility of that information,” he said. “I'm interested in the reliability of the underlying information that was being presented to our top diplomat.”