PART 2: Can You Spot a Serial Killer? BTK, Son of Sam, and What the FBI Found

How does a church president, Boy Scout leader, and devoted family man spend decades as BTK, one of the most feared serial killers in the country?

In Part 1, Mindhunter co-author Mark Olshaker traced how FBI legend John Douglas unlocked the psychology of serial predators through audacious prison interviews and left us at the doorstep of the most baffling double life in American criminal history. Part 2 opens there: how does a church president, Boy Scout leader, and devoted family man spend decades as BTK, one of the most feared serial killers in the country, while everyone around him has no idea?

In this Part 2 conversation with hosts Craig Floyd, Dennis Collins, and Bill Erfurth of Heroes Behind the Badge, Olshaker unpacks Dennis Rader's chilling compartmentalization, the "homicidal triad" warning signs that may identify a serial predator before they strike, and the psychological evolution of David Berkowitz from setting 1,000 fires to terrorizing New York City as the Son of Sam. He also draws a sharp line between serial killers - who expect to get away with it - and mass murderers, who don't.

Bill Erfurth brings it to street level with a real serial killer arrest that ended at a Wendy's drive-through with a punchline no screenwriter would dare write. The episode closes on two of the hardest questions in the field: why are serial predators almost exclusively men, and what does the Nancy Guthrie kidnapping case reveal about how these crimes almost always end?

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Timestamps:

0:00 — VO recap + Cold open: "How does a church president become BTK?"
1:40 — Dennis Rader: serial killer hidden inside a church, a family, and a Boy Scout troop
5:30 — Serial killers who befriend cops — and exactly why they do it
7:10 — Mental illness, legal sanity, and the serial killer who drank blood to survive
10:20 — Can serial killers be predicted? The homicidal triad and David Berkowitz
14:00 — Serial killers vs. mass murderers: two completely different psychologies
16:35 — Bill's real serial killer arrest — and the Wendy's "killer personality" moment
23:05 — Why serial killers are almost always men, Nancy Guthrie, and final thoughts

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Keywords:

Mark Olshaker, Mindhunter Part 2, BTK killer Dennis Rader, Son of Sam David Berkowitz, serial killer prediction, homicidal triad, can you spot a serial killer, serial killer double life, John Douglas FBI, serial killers vs mass shooters, Eileen Wuornos, Nancy Guthrie kidnapping, Heroes Behind the Badge podcast, law enforcement podcast, true crime podcast, serial predator psychology, FBI behavioral science, first responder stories, Craig Floyd, Citizens Behind the Badge

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