On Friday, this city of rocket scientists and brainy inventors was stunned when a neuroscientist with a Harvard Ph.D. was arrested in the shooting deaths of three of her colleagues after she was denied tenure, The New York Times reports. But that was only the first surprise in the tale of the neuroscientist, Amy Bishop, who was regarded as fiercely intelligent and had seemed to have a promising career in biotechnology. Every day since has produced a new revelation from Dr. Bishop’s past, each more bizarre than the last. On Saturday, the police in Braintree, Mass., said that she had fatally shot her brother in 1986 and questioned whether the decision to dismiss the case as an accident had been the right one. On Sunday, a law enforcement official in Boston said she and her husband, James Anderson, had been questioned in a 1993 case in which a pipe bomb was sent to a colleague of Dr. Bishop’s at Children’s Hospital Boston.