Police in Huntsville, Ala., charged Bishop, 44, with capital murder after she allegedly opened fire on six colleagues at a faculty meeting Friday, killing three. Afterward, she calmly called her husband and asked him to pick her up as if nothing had happened, said police Chief Henry Reyes.

"She was an oddball - just not very sociable," said Sylvia Fluckiger, a former lab technician who worked with Bishop in 1993.

Bishop acknowledged at the time being questioned in the bombing attempt of a Harvard medical doctor evaluating her on doctorate work, a professor with whom Bishop was known to quarrel, Fluckiger said.