continued. the fbi told mary and dave only that remains believed to be skylar's had been found. >> i broke down pretty bad, yeah. >> we both did. that was a bad day. >> it was so lonely and so deserted. and it was a horrible thing to know that she had been there and no one knew. >> one, two, three, go! happy birthday, skylar! >> in february of 2013, just as they had since she was a little girl -- >> i'm ready. >> -- the neeses gathered with friends on skylar's birthday. this time without her. they quietly told the lawrences their awful news. >> did your heart just break for mary and dave? >> my heart was slowly breaking the entire time. >> i remember the first thing i felt it was just like a surreal of, i know she's not out there