BURLINGTON, VT (AP).- A childhood fascination with archaeology and a chance encounter with a 2,700-year-old Egyptian mummy are helping Vermont doctors and law enforcement officials find truth in some of the most challenging of modern-day crimes: the unexplained deaths of young children. After spotting the mummy at the University of Vermont‘s Robert Hull Fleming Museum in Burlington, Dr. Jason Johnson, a radiology resident, arranged to have it put through his hospital’s state-of-the-art CT scanner. He wanted to know about the life of what is believed to be the remains of an Egyptian servant girl of about 14 — and what led to her death. What Johnson didn’t expect was that some of the scientific techniques used to reveal the mummy’s secrets would have other applications, including