Looks like our sometimes-shirtless FBI agent has a face and a name.

Frederick W. Humphries II is the bald, blue-eyed 47-year-old terrorism investigator who started the case that uncovered the affair between Gen. David Petraeus and his biographer Paula Broadwell in late summer. Law enforcement colleagues revealed his identity on Wednesday, according to The New York Times.

Tampa military socialite Jill Kelley was friends with Humphries. She told him she was receiving threatening emails from an anonymous sender only known as "kelleypatrol." The sender accused Kelley of having an affair with Petraeus. The FBI began an investigation that revealed Broadwell as the sender of the emails. This led to their discovery of flirtatious emails between her and Petraeus and uncovered their extramarital affair.

Although he was not assigned to the case, Humphries kept pursuing it. He was concerned the Petraeus/Broadwell affair was a threat to national security. His FBI superiors even told him to stop working on it.

But Humphries continued. In October, he brought the issue to Republican Representative Dave Reichert from Washington State. Reichert then had Humphries contact Republican House Majority Leader Eric Cantor, who then told FBI director Robert S. Mueller II. The FBI questioned Petraeus and Broadwell, who each admitted to having the affair. On Election Day, Director of National Intelligence James R. Clapper Jr. told Petraeus to resign as director of the CIA. Petraeus did so last Friday.

Until now, Humphries was only known as the "anonymous FBI agent" who sent topless photos of himself to Kelley. Lawrence Berger, general counsel for the Federal Law Enforcement Officers Association, told The New York Times the picture Humphries sent Kelley was not meant to be sexual.

Read the full New York Times article here.