The Thumb Butte Trail Killer: DNA's 36-Year Pursuit

The episode details the decades-long investigation into the 1987 murder of Cathy Sposito on a popular hiking trail in Prescott, Arizona. For over thirty years, the case remained cold despite the recovery of male DNA from the brutal crime scene. Breakthroughs in forensic genetic genealogy eventually allowed investigators to link the killing to Brian Bennett, a man with a history of violent sexual assaults in the region. Although Bennett died by suicide in 1994, detectives confirmed his guilt by exhuming his remains and matching his DNA to the evidence. This process also connected him to multiple other victims, finally providing closure to the community and Sposito’s family. The narrative highlights how modern scientific advancements can solve historical crimes that were once considered unsolvable.

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This episode includes AI-generated content.