A neurobiologist at the University of Alabama in Huntsville is accused of killing three colleagues on Friday. She opened fire at a faculty meeting and also injured other faculty. The full story is still coming out and, as the New York Times put it in a headline, “Twists Multiply in Alabama Shooting Case.” She fatally shot her brother 20-plus years ago and some question how the case was handled by the police. And she and her husband were questioned, though not charged, in a bombing incident at Harvard.