Mutant Anthrax Cells Led, Slowly, to Ivins

The anthrax poisoning case against Bruce Ivins won't be made in court, but it is compelling, the FBI says. Although the late Army scientist's lawyer dismisses the case as “heaps of innuendo,” federal records reveal a far-reaching, exhaustive investigation that required newly invented technology and depended on mutant bacteria, reports the Washington Post.

It took the experienced eye of a career scientist to notice that the strain of anthrax used in the 2001 attacks had strange properties. While most batches have one mutation or none, this one had five, indicating someone had painstakingly cultivated it. Though dozens had access to Ivins' secret stash of that strain, only he had the skills to prepare it, investigators say. (More Bruce Ivins stories.)