Gabby Petito: New lead in search for Brian Laundrie, investigating sightings on Appalachian Trail

As Gabby Petito's family demands fiance Brian Laundrie turn himself in, a new sighting of Laundrie along the Appalachian Trail near the North Carolina-Tennessee border over the weekend has come to light. There were also new developments about Laundrie's sister's possible interaction with Laundrie in the days before he went missing.