Who Hasn’t Had a Few Bad Days

It’s starting to seem that Amy Bishop, the biology professor who mowed down three colleagues at the University of Alabama in Huntsville (UAH) last week, had not one but perhaps as many as three outbursts of homicidal violence in her life. She shot her brother to death in an incident that was ruled an accident at the time but looks much more like an argument that escalated to murder. And she was investigated but never charged after a pipe bomb (which did not detonate) was mailed to the guy who ran the lab she was working in at Harvard. Justin Elliott looks at what we know so far.