New details in Nancy Guthrie disappearance as Savannah Guthrie and siblings make emotional plea

It has been another gut-wrenching day here at NBC News as investigators search for Savannah Guthri's mother, Nancy. Today, authorities providing the most information yet, including new details about that purported ransom note received by multiple news outlets. Law enforcement still not certain it's authentic, but officials say it included a deadline for today at 5:00 p.m. local time there in Tucson. They also released key details described in the note, including references to Nancy Guthri's Apple Watch and ...