From the NY Times.

The complaint was more intriguing, the officials acknowledged, because the author of the e-mails, which criticized Ms. Kelley for supposed flirtatious behavior toward Mr. Petraeus at social events, seemed to have an insider’s knowledge of the C.I.A. director’s activities. One e-mail accused Ms. Kelley of “touching” Mr. Petraeus inappropriately under a dinner table.

“There was a legitimate case to open on the facts, with the support of the prosecutors,” said the official who described the search at Ms. Broadwell’s home. He added, “They asked, does somebody know more about Petraeus than you’d expect?”

Ms. Kelley, a volunteer with wounded veterans and military families, brought her complaint to a rank-and-file agent she knew from a previous encounter with the F.B.I. office, the official also said. That agent, who had previously pursued a friendship with Ms. Kelley and had earlier sent her shirtless photographs of himself, was “just a conduit” for the complaint, he said. He had no training in cybercrime, was not part of the cyber squad handling the case and was never assigned to the investigation.

But the agent, who was not identified, continued to “nose around” about the case, and eventually his superiors “told him to stay the hell away from it, and he was not invited to briefings,” the official said. The Wall Street Journal first reported on Monday night that the agent had been barred from the case.

Later, the agent became convinced — incorrectly, the official said — that the case had stalled. Because of his “worldview,” as the official put it, he suspected a politically motivated cover-up to protect President Obama. The agent alerted Eric Cantor, the House majority leader, who called the F.B.I. director, Robert S. Mueller III, on Oct. 31 to tell him of the agent’s concerns.

The official said the agent’s self-described “whistle-blowing” was “a little embarrassing” but had no effect on the investigation.

So his "worldview" made him want to somehow embarrass Obama over this? Who was this upstanding law enforcement agent? And how in the hell would it have hurt Obama? Patraeus wasn't running for any office and he's a republican. Up until last week he was mentioned as a future gop presidential candidate.