Pima County Sheriff Chris Nanos shares new update on the 84-year-old Nancy Guthrie's case after Savannah released the new plea.

Pima County Sheriff Chris Nanos shared an update on the investigation of Savannah Guthrie's mother Nancy during an appearance on the \

Pima County Sheriff Chris Nanos said authorities are “working this as hard as we can” after Savannah Guthrie’s latest plea for the return of her missing mother.