When his parents disappear, Chandler Halderson's social media helps investigators unravel the case. "48 Hours" correspondent Erin Moriarty reports.

In 1982 the bodies of Annette Schnee and Bobbie Jo Oberholtzer were found outside a luxe ski town. A man rescued from a snowdrift the night of the murders turned out to be their killer. "48 Hours" contributor Natalie Morales reports