Four years after anthrax attacks killed five Americans, one of the most exhaustive investigations in FBI history has produced no arrests – and is showing signs of growing cold.
In the past year the number of FBI agents working on the case has dropped from 31 to 21, and the number of postal inspectors has fallen from 13 to 9.
FBI officials say investigators are still working diligently to find who was responsible for the anthrax-laced mailings, the Washington Post reports.
The anthrax attacks killed five people in Florida, New York, Connecticut and Washington, D.C., sickened 17 and led to the temporary shutdown of the House, Senate and Supreme Court buildings.
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According to the Post, the intense probe has involved:
More than 8,000 interviews.
Dozens of searches of houses, laboratories and other locations.
5,000 subpoenas.
The fruitless draining of a pond in Frederick, Md., thought to contain evidence in the case – at a cost of $250,000.
Two trips to Afghanistan and investigations on four continents.
"It doesn’t sound like they’re close to cracking the case,” said Eric H. Holder Jr., a deputy attorney general during the Clinton administration.
The FBI and postal inspectors have spent months putting together an internal report that will review the investigation.
The report will revisit what has been the prevailing theory in the case: The culprit is a U.S. scientist who had access to the high-grade anthrax and the knowledge of how to use it as a weapon.
Authorities hope that the report will help determine the future course of the investigation.
At one point in the probe, authorities received information from one or more detainees at the U.S. military prison at Guantanamo Bay, Cuba, that there was an anthrax storage facility near Kabul, Afghanistan. Believing that anthrax spores might have been taken from a U.S. lab and sent overseas, agents checked the Kabul area in May 2004, but found nothing.
A few months later a search in another area of Afghanistan also proved to be a dead end.
Thomas L. Morris III’s father, a postal worker in Washington, died of anthrax inhalation in October 2001. Morris told the Post: "It’s been out there too long. I don’t think they’re going to find out” who was behind the attacks.