Arizona authorities investigating the abduction of Savannah Guthrie’s mom are still holding out hope that she’s alive and that they can rescue her, the sheriff revealed. “We have nothing else to go on but the belief that she is here,

The investigation into the disappearance of Savannah Guthrie's 84-year-old mom Nancy continues for a fourth day, as new details emerge from Arizona.

Savannah Guthrie's mother Nancy's house has officially been declared as a 'crime scene' after she disappeared.

The Arizona sheriff leading the investigation into the disappearance of “Today” host Savannah Guthrie’s mother choked up as he described the desperate search for the missing 84-year-old. Pima County Sheriff Chris Nanos was speaking to CBS 5 host Briana Whitney as the rescue mission for Nancy Guthrie enters its fourth day.

"They are a family and they lean on each other," Pima County Sheriff Chris Nanos told PEOPLE

The disappearance of Nancy Guthrie, mother of the news anchor Savannah Guthrie, has reporters, neighbors and drones flooding streets and foothills in Tucson, Ariz.

A man who was involved in a human smuggling operation was shot in an exchange of gunfire with the U.S. Border Patrol and after firing at a federal helicopter, authorities said.

Pima County Sheriff Chris Nanos emphasized Tuesday, Feb. 3 that investigators believe 84-year-old Nancy Guthrie was taken against her will