BLACKSBURG -- Virginia Tech police on Thursday released gruesome details of a killing in a campus cafe, as students wondered why a campus that went two decades without a murder before the April 16, 2007, shootings has become the site of so much tragedy. When police arrived Wednesday night at Au Bon Pain inside the Virginia Tech Graduate Life Center, they found a decapitated female victim who had arrived on campus just two weeks ago and a young man they have now charged with killing her. The events have shocked a campus still coping with the 2007 shootings of 32...