As authorities and the Guthrie family face a second deadline from a reported ransom note in Nancy Guthrie's abduction, authorities returned to her Tucson home to investigate rooftop cameras, search the septic tank, and more. Aaron Katersky has the latest. https://abcnews.link/r3WytFz?utm_source=facebook&utm_medium=social&utm_campaign=dhfacebook&utm_content=app.dashsocial.com/abcworldnewstonight/library/media/638901632 | ABC World News Tonight with David Muir