The FBI has reportedly reviewed a ransom note sent to a local news station amid the disappearance of Savannah Guthrie's mom, Nancy Guthrie. Pima County Sheriff Chris Nanos told CBS News on Tuesday, February 3, that investigators have analyzed the alleged note, which was received by an unspecified station in Arizona one day prior. "It's like any piece of evidence," Nanos told CBS News. "You give it to us, you give us a lead, we're going to look at every aspect of that lead." According to the sheriff, the FBI decided to share the note with Savannah, 54, who is in Arizona with her family.