Guam - The Guam Police Department's Criminal Investigation Division has launched a death investigation to determine the circumstances involving the death of Agat resident Lydia Grigley. The 49-year-old woman was preparing for her early morning walk but while she was stretching a concrete pillar fell on top of her. The incident occurred at a home along Rt. 2a and Camachili Street just before eight o'clock this morning. Chief Medical Examiner Dr. Aurelio Espinola pronounced Grigley dead at the scene about an hour later. An autopsy is scheduled for later today.