Nancy Guthrie's family is expressing growing frustration with the pace of the investigation as the search enters its 100th day with no leads.

Nancy Guthrie case: Pima County Sheriff Chris Nanos states investigators are keeping details about Nancy Guthrie's disappearance secret to protect the case. Khloe Kardashian has…

Pima County Sheriff Chris Nanos opened up about the missing person's investigation for Savannah Guthrie's mother, Nancy Guthrie, in a new interview.