World News Tonight with David Muir Full Episode: Wednesday, February 4, 2026
Feb 5, 2026
Trevor Ault, television correspondent reporting from Tucson, gives on-scene updates. He covers the urgent FBI-led search for Nancy Guthrie and leads on pacemaker data and ransom-letter leads. Short segments also touch on federal agent drawdowns in Minneapolis and the investigation into an alleged Las Vegas bio lab.
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FBI Deepens Search For Nancy Guthrie
- The FBI has increased its presence and set up a task force with tech and hostage negotiation experts in Nancy Guthrie's disappearance.
- Authorities are investigating possible ransom letters and tracking pacemaker data as critical leads.
Family’s Public Plea For Proof Of Life
- Savannah Guthrie and her siblings posted an Instagram plea asking captors to prove their mother is alive and to reach out to investigators.
- The family emphasized Nancy's fragile health and urgent need for daily medication.
Pacemaker Data Could Narrow Timeline
- Investigators noted Nancy Guthrie's pacemaker disconnected from its monitoring app early Sunday, offering a potential timeline clue.
- That device status may help narrow when she was taken and guide search efforts.