Overview
- A Pima County Sheriff’s Department helicopter was fitted with radio‑frequency detection gear for grid flights over residential areas near Tucson, with the FBI employing similar tools.
- Digital forensics experts say a pacemaker’s detectable response typically extends only 10–30 meters, requiring high‑gain antennas and very slow passes to allow 10–15 seconds for a reply.
- Guthrie, 84, was last seen January 31 and reported missing February 1, with investigators citing a disabled doorbell camera at 1:47 a.m. and her pacemaker disconnecting from her phone at 2:28 a.m.
- Authorities classify the case as a suspected abduction with no proof of life or death to date, and they have released surveillance images and video while coordinating with the FBI.
- The sheriff’s office reports nearly 18,000 tips and a reward increased to $100,000, while ABC reports blood was found on the porch and ransom notes were sent to news outlets with deadlines that passed.