Pima County Sheriff urges public to avoid interfering with Nancy Guthrie investigation

The search for Nancy Guthrie in Tucson, Arizona, enters its fourth week, prompting a warning from the Pima County Sheriff against public interference in the investigation. Senior Correspondent Claudia Cowan reports on local volunteers actively searching for potential evidence, while Former FBI Supervisory Special Agent James Gagliano emphasizes why this work is best left to professionals to avoid contaminating evidence or hindering prosecution efforts.