The F.B.I. investigation that toppled the director of the C.I.A. and has now entangled the top American commander in Afghanistan underscores a danger that civil libertarians have long warned about: that in policing the Web for crime, espionage and sabotage, government investigators will unavoidably invade the private lives of Americans.
On the Internet, and especially in e-mails, text messages, social network postings and online photos, the work lives and personal lives of Americans are inextricably mixed. Private, personal messages are stored for years on computer servers, available to be discovered by investigators who may be looking into completely unrelated matters. [...]
For privacy advocates, the case sets off alarms.
“There should be an investigation not of the personal behavior of General Petraeus and General Allen, but of what surveillance powers the F.B.I. used to look into their private lives,” Anthony D. Romero, executive director of the American Civil Liberties Union, said in an interview. “This is a textbook example of the blurring of lines between the private and the public.”
Law enforcement officials have said they used only ordinary methods in the case, which might have included grand jury subpoenas and search warrants. As the complainant, [Jill Kelley, a friend both of David H. Petraeus, the former C.I.A. director, and Gen. John R. Allen, the top NATO commander in Afghanistan,] presumably granted F.B.I. specialists access to her computer, which they would have needed in their hunt for clues to the identity of the sender of the anonymous e-mails. While they were looking, they discovered General Allen’s e-mails, which F.B.I. superiors found “potentially inappropriate” and decided should be shared with the Defense Department. [...]
The hazards of the Web as record keeper, of course, are a familiar topic. [...] But the events of the last few days have shown how law enforcement investigators who plunge into the private territories of cyberspace looking for one thing can find something else altogether, with astonishingly destructive results.
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