Gang war was intensifying, and police and community activists were meeting in attempts to quash the violence between the two sides. It was the summer of 2006, and 18-year-old Herman Taylor III, who attended Belmont High School as part of the Metco program, was walking home from a friend's house in Roxbury.Taylor was gunned down about 500 feet from his front door, an innocent victim in a case of mistaken identity, prosecutors say.His death sent waves of grief and mourning through two communities - in the Humboldt Avenue neighborhood of Roxbury and at Belmont High School, where Taylor was a popular student who excelled academically and as a basketball...