At 1:47 a.m., Nancy Guthrie’s doorbell camera went dark. Forty minutes later, her pacemaker disconnected. By noon, her family realized something was wrong. Blood was discovered on her porch. Ransom notes demanding millions in bitcoin began arriving at media outlets. Then, newly recovered footage revealed a shadowy figure approaching her home — attempting to cover the camera before walking away. Nancy Guthrie, 84, has been missing since February 1st. A person of interest was detained — then released without charges. Authorities say the investigation remains active and ongoing. What happened in those early morning hours? And who is the person seen on camera? Here’s everything we know so far. If you have information, contact the FBI at 1-800-CALL-FBI or tips.fbi.gov. THE LATEST IN THE CASE: Security footage push: thenationaldesk.com/news/americas-news-now/fbi-arizona-pushes-for-security-footage-from-nancy-guthries-neighbors-tucson-tip-lines-flooded-with-18-thousand-calls-leads-...