>> skyler neese. >> the neese's world had fallen apart. their only daughter had disappeared into the night. and now, she'd been gone for nearly 24 hours. where was skyler? >> the investigation begins and concern for skyler begins to grow. >> coming up. >> just had this horrible feeling in my heart that something terrible had happened. >> mary told me that night she said something's wrong. something's bad wrong. >> a grainy piece of videotape is about to give police one giant clue. what can they glean from this? >> she slowly walked down to a car, and she got in the backseat. >> when "dateline" continues. protect your pet with the #1 name in flea and tick protection. frontline plus. trusted by vets for nearly 20 years. frontline plus. aleve it. with aleve pm. pain happens. the only one to combine a safe sleep aid. and the 12-hour pain relieving strength of aleve. so...magic mornings happen. there's a better choice. aleve pm. when they bundle home and auto with progressive. wow, that's... and now the progressive commercial halftime show, fea