The FBI has routinely used national security letters to obtain vast amounts of data on innocent Americans, which then gets shared with other federal agencies, according to today’s Washington Post.

I first brought you this story back in August, when the FBI served a national security letter on an unidentified library system. The Post identified the library system in question today.

The FBI came calling in Windsor, Conn., this summer with a document marked for delivery by hand. On Matianuk Avenue, across from the tennis courts, two special agents found their man. They gave George Christian the letter, which warned him to tell no one, ever, what it said.

Under the shield and stars of the FBI crest, the letter directed Christian to surrender “all subscriber information, billing information and access logs of any person” who used a specific computer at a library branch some distance away. Christian, who manages digital records for three dozen Connecticut libraries, said in an affidavit that he configures his system for privacy. But the vendors of the software he operates said their databases can reveal the Web sites that visitors browse, the e-mail accounts they open and the books they borrow.

Christian refused to hand over those records, and his employer, Library Connection Inc., filed suit for the right to protest the FBI demand in public. The Washington Post established their identities — still under seal in the U.S. Court of Appeals for the 2nd Circuit — by comparing unsealed portions of the file with public records and information gleaned from people who had no knowledge of the FBI demand.

The Connecticut case affords a rare glimpse of an exponentially growing practice of domestic surveillance under the USA Patriot Act, which marked its fourth anniversary on Oct. 26. “National security letters,” created in the 1970s for espionage and terrorism investigations, originated as narrow exceptions in consumer privacy law, enabling the FBI to review in secret the customer records of suspected foreign agents. The Patriot Act, and Bush administration guidelines for its use, transformed those letters by permitting clandestine scrutiny of U.S. residents and visitors who are not alleged to be terrorists or spies.

The FBI now issues more than 30,000 national security letters a year, according to government sources, a hundredfold increase over historic norms. The letters — one of which can be used to sweep up the records of many people — are extending the bureau’s reach as never before into the telephone calls, correspondence and financial lives of ordinary Americans.

Issued by FBI field supervisors, national security letters do not need the imprimatur of a prosecutor, grand jury or judge. They receive no review after the fact by the Justice Department or Congress. The executive branch maintains only statistics, which are incomplete and confined to classified reports. The Bush administration defeated legislation and a lawsuit to require a public accounting, and has offered no example in which the use of a national security letter helped disrupt a terrorist plot. — Washington Post

The Post article goes on to profile two other cases where national security letters have been used in the past, and offers the FBI’s lame excuses for spying on innocent Americans.

“If you have a list of, say, 20 telephone numbers that have come up . . . on a bad guy’s telephone,” said Valerie E. Caproni, the FBI’s general counsel, “you want to find out who he’s in contact with.” Investigators will say, ” ‘Okay, phone company, give us subscriber information and toll records on these 20 telephone numbers,’ and that can easily be 100.”

Bush administration officials compare national security letters to grand jury subpoenas, which are also based on “relevance” to an inquiry. There are differences. Grand juries tend to have a narrower focus because they investigate past conduct, not the speculative threat of unknown future attacks. Recipients of grand jury subpoenas are generally free to discuss the subpoenas publicly. And there are strict limits on sharing grand jury information with government agencies.

Since the Patriot Act, the FBI has dispersed the authority to sign national security letters to more than five dozen supervisors — the special agents in charge of field offices, the deputies in New York, Los Angeles and Washington, and a few senior headquarters officials. FBI rules established after the Patriot Act allow the letters to be issued long before a case is judged substantial enough for a “full field investigation.” Agents commonly use the letters now in “preliminary investigations” and in the “threat assessments” that precede a decision whether to launch an investigation.

“Congress has given us this tool to obtain basic telephone data, basic banking data, basic credit reports,” said Caproni, who is among the officials with signature authority. “The fact that a national security letter is a routine tool used, that doesn’t bother me.”

If agents had to wait for grounds to suspect a person of ill intent, said Joseph Billy Jr., the FBI’s deputy assistant director for counterterrorism, they would already know what they want to find out with a national security letter. “It’s all chicken and egg,” he said. “We’re trying to determine if someone warrants scrutiny or doesn’t.”

Billy said he understands that “merely being in a government or FBI database . . . gives everybody, you know, neck hair standing up.” Innocent Americans, he said, “should take comfort at least knowing that it is done under a great deal of investigative care, oversight, within the parameters of the law.”

He added: “That’s not going to satisfy a majority of people, but . . . I’ve had people say, you know, ‘Hey, I don’t care, I’ve done nothing to be concerned about. You can have me in your files and that’s that.’ Some people take that approach.” — Ibid.

Oversight, sure. The DOJ regularly blows off Congress when it attempts to perform any meaningful oversight on national security letters. And you know it’s bad when it’s got staunch conservatives siding with the ACLU.

“The beef with the NSLs is that they don’t have even a pretense of judicial or impartial scrutiny,” said former representative Robert L. Barr Jr. (Ga.), who finds himself allied with the American Civil Liberties Union after a career as prosecutor, CIA analyst and conservative GOP stalwart. “There’s no checks and balances whatever on them. It is simply some bureaucrat’s decision that they want information, and they can basically just go and get it.” — Ibid.

The full article is well worth your time, so go read it. And thanks to Irregular Times for the tip.

By the way, if you want to know what information the FBI is holding on you, you can file a Freedom of Information Act request. No guarantees that you’ll get anything back, or that what you get back won’t be mostly blacked out, though.