on the nature of a credible threat...,

NYTimes | Not long after Amy Bishop was identified as the professor who had been arrested in the shooting of six faculty members at the University of Alabama in Huntsville on Feb. 12, the campus police received a series of reports even stranger than the shooting itself.

Several people with connections to the university’s biology department warned that Dr. Bishop, a neuroscientist with a Harvard Ph.D., might have booby-trapped the science building with some sort of “herpes bomb,” police officials said, designed to spread the dangerous virus.

Only people who had worked with Dr. Bishop would know that she had done work with the herpes virus as a post-doctoral student and had talked about how it could cause encephalitis. She had also written an unpublished novel in which a herpes-like virus spreads throughout the world, causing pregnant women to miscarry.

By the time of the reports, the police had already swept every room of the science building, finding nothing but a 9-millimeter handgun in the second-floor restroom.

But the anxious warnings reflected the fears of those who know Dr. Bishop that she could go to great lengths to retaliate against those she felt had wronged her.