It’s a case that’s captivated America and grabbed headlines around the world. The disappearance of Nancy Guthrie, the mother of Australian-born US Today show host Savannah Guthrie.The 84-year-old has been missing for more than three weeks and the mystery only deepened with the release of eerie doorbell footage showing a masked person at her door.Today, we speak to former FBI profiler, Mary Ellen O’Toole, who spent her career studying the criminal mind.  She tells us why it’s not likely a burglary gone wrong and what she sees in the demeanour of the masked figure. Featured: Mary Ellen O’Toole, former FBI profiler and currently director of the forensic science program at George Mason University