This is the finale of our Serial Killers and Conspiracy Theories crossover: By 2011, the FBI was ready to reexamine the evidence. A theory emerged: What if the Mad Poisoner was actually the Unabomber? Ted Kaczynski had proven he was a revenge-seeking terrorist, and he had connections to Chicago. Perhaps he traded homemade bombs for poisoned pills. Or maybe the deadly concoctions came straight from the Johnson & Johnson facility itself. In the absence of clear answers, only theories remain… and rumors that someone is still out there, replacing Halloween treats with fatal tricks.

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