ATLANTA – (WAOK) Gwinnett police say a 72-year old woman, who disappeared from her son’s Lawrenceville home on Monday, has been found safe. Chang Peterson apparently walked away from the house on Rock Springs Road, and vanished, but had been spotted near Rock Springs Park. Officers searched several hours, but couldn’t find her. Investigators say Peterson, who suffers from mild dementia was found outside in a nearby yard, and had apparently spent the night outside in frigid temperatures. She was to be examined by EMS personnel, but is expected to be okay.