in brazil or something -- >> reporter: and as the years passed, paige's story went from the front of the paper to being filed away on microfiche. where was she? coming up -- they were about to find out. and it would transform the case. >> now we need to make a critical decision. >> and then, a brand new theory of what happened to paige. >> i think that triggers something and something went wrong. >> when "dateline" continues. ons oh, come on! sriracha? woo! don't fight your cravings. eat 'em. all the flavors you crave in a superfood. blue diamond almonds. crave victoriously. geico would like to take a moment to say thank you to our military service members at home and abroad for all their hard work and sacrifice. we all sleep easier knowing you're out there keeping us safe.