'You ruined my life. You ruined my baby's life!' Laurie Show was as compassionate as she was hard-working. The outgoing high-school junior worked part-time to pay for the home she and her divorced mother shared. Yet she always had time to tutor friends struggling in school. And she befriended a dejected classmate after his traumatic breakup with his pregnant long-time girlfriend Michelle Lambert. But soon things spiraled into jealous obsession, stalking,...