The shootings reverberated across the country, but nowhere more than in her hometown of Braintree, where Bishop was known as a top student, a diligent violinist - and the woman who, as a 21-year-old, fired a shotgun at her teenage brother, blasting a hole in his chest, and killing him in what prosecutors, after a limited investigation, concluded was an accident. Trailed by that memory and driven by an ambition that some who knew her considered overweening, Bishop's life would take her from the manicured suburbs of Boston, to the halls of Harvard, and, finally, to the Deep South, where Bishop lived with her husband and four children in a Huntsville subdivision called Tara, just around the corner from a cul-de-sac named for Scarlett O'Hara.