The search for Savannah Guthrie's mom, Nancy Guthrie, has resulted in a new theory surrounding Mexico. Nearly three weeks after Nancy was last seen alive in Tucson, Arizona, some crime watchers have speculated that the 84-year-old could have found herself in Mexico after being kidnapped from her home. While the Pima County Sheriff's Office isn't confirming the theory, investigators know for certain that Nancy was last seen alive on January 30 after enjoying dinner with family members.