Investigative Failure: Did Police Doom This Case? Did investigative failures cost police their best chance to solve the Nancy Guthrie case? A compromised crime scene, missed evidence, and critical early mistakes may have changed everything. Retired NYPD Sgt. Bill Cannon breaks down the ransom note developments, digital evidence, and the real day-to-day work investigators are doing right now. We also examine whether genetic genealogy and modern DNA science can still identify a suspect.