Overview
- Nancy Guthrie, 84, was last seen at her Tucson home on January 31 and was reported missing the next day, and investigators say the case remains active more than four months later.
- Authorities have sent DNA and other physical evidence to the FBI laboratory in Quantico for advanced testing as Pima County investigators reexamine home security and doorbell footage.
- Law enforcement publicly released video showing a masked person at the residence but has not identified a suspect and no arrests have been made.
- Experts warn the lack of a clear ransom demand, reported blood at the scene, and Guthrie's age and health raise concern that she may not have survived, even as investigators pursue technical leads.
- Police continue to seek public tips and to analyze vehicle telemetry, surveillance networks and digital records because those datasets can tie a person or a route to the home and produce legally usable evidence.