. >> reporter: marcella lancaster has never met kelsie's mom laura saxton, but she knows all about herain. >> you've got to just like try not to cry every day in front of my grandson. >> reporter: just two months after kelsie schelling disappeared, leaving behind no trace but her abandoned car, a strikingly similar fate befell marcella's 25-year-old daughter megan. she vanished from portsmouth, also leaving behind no trace but her abandoned car. >> at first glance, there are a lot of similarities between these two cases, which one could conclude that the same individual or a group are involved in both of them. >> reporter: the portsmouth police are drawing a blank. but marcella and her family have been relentless in their search. >> an eerie feeling like there's something, like we're going to find something. >> reporter: megan's sister-in-law kadie runs point for the family. and so, for more than three years, parallel family tragedies playing out in separate time zones. both families organizing searches, setting up facebook pages to field leads, and doing whatever they can to keep publ