Nancy Guthrie mystery: FBI reviews 6 theories as chilling new lead emerges

Five weeks after Nancy Guthrie vanished from her Arizona home, the FBI is pursuing a chilling new lead involving a potential internet outage. Investigators are exploring theories ranging from a 'crazed fan' to a 'professional' hit, while also examining the possibility of a cartel connection. The case remains a national spectacle with millions in rewards offered.