KPFA - Letters and Politics

Serial Killers & Toxins: The Correlation

Jun 11, 2025
Caroline Fraser, a Pulitzer Prize-winning author known for her work on Laura Ingalls Wilder, dives into the chilling world of serial killers and their possible links to environmental toxins. She discusses the alarming rise of serial killers in the Pacific Northwest and how lead exposure may correlate with violent behavior. Fraser also examines notorious figures like Ted Bundy and Richard Ramirez, shedding light on society's obsession with true crime and the broader implications of toxic pollution on community violence.
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INSIGHT

Lead and Crime Spike Correlation

  • The spike in violent crime and serial killers in the U.S. was highest between the 1970s and 1990s.
  • This period correlates with high environmental lead levels which dropped after lead was banned in gasoline.
INSIGHT

Lead Exposure Affects Aggression

  • Lead exposure in childhood affects brain areas controlling aggression and impulsivity.
  • Removal of leaded gas sharply decreased violent crime about 20 years later, supporting the lead crime hypothesis.
ANECDOTE

Author's Personal Violence Story

  • Caroline Fraser shared that her father was a violent, controlling man who occasionally lost control and frightened his family.
  • This personal story illustrates the spectrum of male violence from domestic to serial crimes.
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