India, June 19 -- Nancy Guthrie Case Latest Update: More than four months after 84 year old Nancy Guthrie vanished from her Tucson home in a chilling overnight abduction, a new search operation in northern Mexico has renewed attention on one of America's most disturbing unresolved missing persons cases. Despite a detailed anonymous tip pointing searchers to a remote burial site near the Arizona border, the latest effort ended without answers, deepening the mystery surrounding the disappearance of Savannah Guthrie's mother.

Nancy Guthrie Case Latest News: Fresh Search Sparks New Hope

Hope briefly surged this week when volunteer search collective Buscando Corazones launched a third search mission near Nogales, Mexico. Acting on informatio...