India, April 3 -- More than 60 days have passed since 84-year-old Nancy Guthrie has disappeared from her home in Tucson's Catalina Foothills in the early morning hours of February 1. Authorities believe she was abducted, but there has been no major breakthrough.

In an interview with NewsNation's senior national correspondent Brian Entin, a source familiar with the investigation revealed that officers at the scene made a critical early error that they assumed Nancy had simply wandered off rather than treating the situation as a potential crime.

"Speaking with some people that actually know the intimate knowledge of this investigation, told me that there was a rush to judgment of what was happening at that scene, and it was that Nancy had...