Four years after the deadly 2001 anthrax attacks, one of the most exhaustive investigations in FBI history has yielded no arrests and is showing signs of growing cold as officials have sharply reduced the number of agents on the case, reports the Washington Post. FBI agents and postal inspectors have pursued leads on four continents, conducted more than 8,000 interviews and carried out dozens of searches of houses, laboratories and other locations. They traveled to Afghanistan twice in the past 16 months to follow up on tips that proved fruitless, said law enforcement sources.
Within law enforcement circles, some say the investigation, which is referred to as the Amerithrax probe, is in urgent need of a big break. In the past year, the number of FBI agents on the case has dropped from 31 to 21, authorities said. During the same time, the number of postal inspectors has fallen from 13 to nine. The reward remains the same: $2.5 million for information leading to an arrest and conviction. FBI officials said investigators are still working diligently to find whoever was responsible for the anthrax-bacteria-laced mailings, which killed five people, sickened 17 others and led to the temporary shutdown of the House, Senate and Supreme Court buildings and numerous postal facilities.