FBI Uses Pacemaker Signals to Search for Savannah Guthrie's Missing Mother in Arizona

Savannah Guthrie issued an emotional plea for her mother's return as the FBI uses specialized helicopters to track Nancy Guthrie's pacemaker signals in Arizona.Investigators are analyzing DNA from a recovered glove and working with Google to extract data from security cameras after Nancy Guthrie was abducted from her home.Pima County Sheriff Chris Nanos confirmed that no proof of life has been established despite ransom notes being sent to media outlets following the disappearance.