Savannah Guthrie released a heartbreaking plea on Instagram 9 months after her mother Nancy Guthrie vanished from her Tucson, Arizona home. The Pima County Sheriff says they are trying to use DNA to crack the case. Sources close to the investigation tell Brian they are still working their way through leads, but have not come up with anything solid. How long can the suspect hide for? In this episode of Brian Entin Investigates, Brian talks with retired FBI Agent Steve Moore about what is happening behind the scenes.