PROVIDENCE — A parent asked what lessons were learned in the wake of the early September shooting death of 15-year-old William Parsons of Central High School, an innocent bystander.Maribeth Calabro, president of the Providence Teachers Union, said it best."We have to do better," she said. "We need to recognize trauma, recognize the red flags." "What I can't get my head around," she said, "is that his death was trending on social media before the [...]