Savannah's mother, Nancy, has been missing since February 1. Get updates on her disappearance here as the FBI reviews a DNA sample collected from her home.

The 84-year-old's whereabouts remain unknown more than three months after authorities believe she was taken from her Tucson, Ariz., home against her will

Khloe Kardashian says it's "mind blowing" that authorities have no new information in the Nancy Guthrie disappearance case after more than 100 days.

A retired Pima County lieutenant reveals how Tucson's desert washes could serve as escape routes in the kidnapping of Nancy Guthrie, age 84.

For many experts steeped in the intricacies of missing persons cases, the Guthrie investigation has raised questions about whether the general public has been conditioned to hold outsized and unrealistic expectations of law enforcement’s capabilities.

Nancy Guthrie, 84, was abducted from her home Feb. 1. Three months later, her case remains open, and the makeshift memorial outside her home has continued to grow.

Blood spatter evidence shows Nancy Guthrie made a last stand on her porch before being abducted, and the suspect made key mistakes, retired FBI agent says.

A human bone discovered near the Tucson, Arizona, home of missing 84-year-old Nancy Guthrie has been determined to be prehistoric and unrelated to her disappearance investigation, authorities said.