On a January afternoon in 2008, 19-year-old college student Adena Rivera-Dundas went for a hike at Chantry Flat. She took a wrong turn and hiked several miles in the wrong direction; with daylight fading she hurried to make it to the parking lot before dark. She and her mother, Heather, tell what happened next...

Heather:  My cellphone rang at 5:20, while I was standing in line at Trader Joe