On January 27, seventh-grader Nicole Lovell barricaded the door to her bedroom and then snuck out the window, taking her Minions blanket and a water bottle. Her body was found three days later, just over the North Carolina border. The 13-year-old had been murdered. Two Virginia Tech students, David Eisenhauer, 18, and Natalie Keepers, 19, are at the center of the murder investigation. So is the social media app Kik.