E313 - Who wrote the Nancy Guthrie notes? The 3 possibilities. And the blood mistake detectives made

The Pima County Sheriff released the full Nancy Guthrie ransom notes. In this episode of Brian Entin Investigates, a forensic linguist explains why she believes both notes were written by the same person. Also, new details emerge about mistakes made early on in the investigation involving blood found on Nancy’s front doorstep. And a new nugget in the DNA quest.

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