Frederick Humphries is the FBI agent who first brought the case of David Petraeus' affair to the Bureau, CBS News confirms.
As a friend of Jill Kelley, Humphries took her concerns about harassing emails to the FBI's cyber squad in Tampa, CBS News' Bob Orr reports. Eventually that investigation mushroomed and led to the discovery of the Broadwell/Petraeus affair and led to the retired general's resignation as CIA director.
Law enforcement sources say Humphries became disgruntled with being cut out of the information loop as the investigation grew wider and he eventually leaked information about the case to members of Congress.
It began in June as a low-level cyber investigation in Florida. Kelley has done fundraising for the U.S. military and Humphries is a veteran counter-terrorism agent, although the details of their relationship are unclear. The FBI quickly traced the emails to Broadwell, a former Army intelligence officer and author of "All In: The Education of General David Petraeus."
The FBI investigation uncovered about a half-dozen e-mails from Broadwell to Kelley. While they did not openly name Petraeus, some of them contained information about his travel schedule - details not usually available to the public.
Concerned that someone may have breached Petraeus e-mail, the investigation continued. It took the FBI some time to discover that Broadwell got the information from Petraeus himself and without his knowledge, rather than a breach.
Once the FBI found sexually explicit e-mails between Broadwell and Petraeus, they realized they had stumbled across an extra-marital affair. The relationship occurred while Broadwell was promoting her biography on tour.
Humphries later brought details of the case to Congressman Dave Reichert. Rep. Reichert then relayed the information to House Majority Leader Eric Cantor, R-Va., raising concerns of a national security risk. Some lawmakersthey were left out of the loop.
No one has been charged in the case. President Barack Obama said Monday there's no evidence Petraeus' and Broadwell's relationship posed a risk to national security.
Humphries, a veteran counter-terrorism agent, has since been reassigned and his status is being reviewed by the FBI.
Sources also tell CBS News that Humphries once sent a shirtless picture of himself to Kelley, but it happened a long time ago, well before the investigation.