Polygraphs in Nancy Guthrie case — how they could be narrowing the search to find a suspect

Brian Entin Investigates · Jun 1, 2026 · 35m

It has been four months since Nancy Guthrie vanished from her Tucson, Arizona home. In this episode of Brian Entin Investigates, Brian rebuffs some reports that detectives are getting closer to a suspect name. Also, renowned detective Jon Buehler examines the case and explains how polygraphs work and why they could be critical in narrowing down the search for who is responsible. Thank you to this episode's sponsor! -Incogni: They can't harm you, if they can't find you! Use code brianentin at the link below and get 60% off an annual plan: ⁠⁠⁠⁠incogni.com/brianentin⁠⁠⁠⁠ Watch the video version…