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One pill. That’s all it took. In 1982, a wave of sudden deaths in Chicago stunned the nation—healthy people dropped dead after taking Tylenol. What seemed like a medical mystery quickly unraveled into a chilling case of product tampering, fear, and mass hysteria. Who was behind it? Why did they do it? And how did it change the way we trust what’s on our shelves? This is the story of the Tylenol Murders—an unsolved crime that still haunts America.

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