Anthrax Under Water

This is creepy:

The FBI has developed a new theory on a central mystery of the 2001 anthrax attacks after finding evidence in a Frederick, Md., pond that may suggest how an ingenious criminal could have packed deadly anthrax spores into envelopes without killing or sickening himself, according to sources close to the investigation.

A piece of equipment and other evidence recovered this winter from ice-covered ponds in Frederick Municipal Forest have reinvigorated the 18-month-old case, leading officials to explore a novel theory with shades of science fiction. Some involved in the case believe that the killer may have waded into shallow water to delicately manipulate anthrax bacteria into envelopes, working within a partly submerged airtight chamber. When finished, the killer could have easily hidden the evidence by simply dumping contaminated equipment and clothing into the pond.