It was every parent's worst nightmare. On a sun-drenched morning in April 2012, a Maryland state trooper knocked on Betty Shaw's front door and delivered the grim news that her 17-year-old daughter, Liz, had been involved in a horrible car accident and was clinging to life. Liz recovered from her life-threatening injuries but suffered severe and permanent effects from the accident. Texting while driving caused Liz's crash, and...