By David Alexander and Mark Hosenball
WASHINGTON (Reuters) - The scandal that felled CIA Director David Petraeus widened on Tuesday to snare the top U.S. commander in Afghanistan, Marine General John Allen, who was being investigated for "flirtatious" communications with a woman at the center of the case.
Though a law enforcement probe has not uncovered any evidence so far of legal wrongdoing or security risks, it does raise questions about the unusually close relationship between a Florida socialite, her sister and two of the most powerful men in the United States' national security apparatus.
The woman in question, Jill Kelley, has emerged as a central figure in the scandal that has brought down one of the most admired military leaders in the United States and threatens to derail the career of another.
Defense officials and people close to Petraeus say neither he nor Allen had a romantic relationship with Kelley, a 37-year-old wife and mother, who is described as a prominent presence in military circles in Tampa.
She may have been seen as a rival by Petraeus' biographer, Paula Broadwell, who sent Kelley a series of anonymous, harassing emails which touched off an investigation that uncovered evidence of an affair between Petraeus and Broadwell.
According to law enforcement sources, FBI investigators decided to pursue the matter when they found the messages contained information about the CIA chief's activities that was not publicly available.
Kelley had gotten to know both Petraeus and Allen as a volunteer setting up social events at MacDill Air Force Base outside Tampa, headquarters of U.S. Central Command.
The relationship was evidently close enough that both men intervened in a child custody battle involving Kelley's twin sister, Natalie Khawam.
"She is a dedicated mother, whose only focus is to provide the necessary support, love, and care for her son," Allen wrote about Khawam in a September 22 letter to a Washington, D.C., court.
Allen and Kelley communicated often enough over the past two years to produce between 20,000 and 30,000 pages of email and other messages, which were turned over to Defense Department investigators on Sunday.
The actual volume of communications is likely much smaller, an official said, as the printouts include messages involving other people and email threads including prior communications.
A senior defense official told Reuters the messages were seen as inappropriate because they were "flirtatious" in nature, not because they dealt with sensitive information.
But "flirtatious" may be an understatement. Another U.S. official said the Pentagon only decided to refer it for investigation after an initial look found the communications to be of "a sufficient character" to warrant further review.
Allen has denied that the two had a sexual relationship, officials said on condition of anonymity. Adultery can lead to a dishonorable discharge under U.S. military law.
WHITE HOUSE BACKS ALLEN
The scandal complicates President Barack Obama's efforts to reorganize his national security team following his re-election. The White House said it still had faith in Allen, but its plans to transfer him to Europe, where he would head U.S. and allied forces, have been suspended.
Obama also has to find a replacement for Petraeus at the CIA at a time when the president is vetting candidates to head the State and Defense departments.
The scandal could throw a wrench into Obama's relations with Congress at a time when he is engaging in high-stakes budget negotiations to avoid the combination of tax hikes and spending cuts known as the "fiscal cliff."
"I certainly wouldn't call it welcome," White House spokesman Jay Carney said of the scandal. Continued...