In 1987, fire investigator Sarah Chen noticed something others missed in a series of apartment blazes that killed eleven people—a pattern hidden in the burn marks that defied conventional wisdom about how fires spread. Her controversial theory about the perpetrator's psychological compulsion to leave a specific thermal signature would take fifteen years to prove, but when it did, it revealed one of the most methodical serial arsonists in American history. Hosted by Simplecast, an AdsWizz company. See https://pcm.adswizz.com

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