The disappearance of 84-year-old Nancy Guthrie, the mother of NBC Today co-anchor Savannah Guthrie has escalated into one of the most closely watched investigations in the United States. What began as a missing-person report in Catalina Foothills, Arizona, has now evolved into a full-scale FBI-led abduction probe, with disturbing new evidence reshaping the case. Former FBI analysts say the backpack, believed to resemble an Ozark Trail Hiker model, points to a low-cost but deliberate operation, raising the possibility that purchase records could become a key investigative lead. Authorities are now tracing potential retail connections that may help identify the suspect’s movements. WATCH