Watch Nancy Grace Mysteries: Jaycee Dugard Monday at 8 p.m. ET on HLN.
An 11 year old girl is abducted outside her home while walking from her school bus stop. She remained missing for more than 18 years until she was found alive living with her abductors, a married couple. How did her kidnapping go unsolved for nearly 2 decades? How did her captors keep her hidden in plain sight from not just law enforcement, but neighbors and friends? Nancy Grace investigates the mystery of her harrowing ordeal.