Theories of the Third Kind

Chicago Tylenol Murders: The Unknown Wanderer

September 24, 2026·49 min
Episode Description from the Publisher

In September 1982, seven people around Chicago suddenly died after taking Extra-Strength Tylenol capsules that had been secretly filled with cyanide. The killer was never caught, and more than four decades later, the Chicago Tylenol Murders remain one of America's most infamous unsolved crimes.Then, only a few months after the poisonings, a mysterious man was found dead from cyanide inside a Catholic church in Boise, Idaho. He carried no identification, left behind $1,900 and a note signed with a fake name, and successfully hid his identity for more than 40 years.He became known as the Unknown Wanderer.Now, investigators have finally identified him as Dr. Mathew Francis Betkouski, an organic chemist whose history with cyanide, pharmaceuticals and the Chicago area has raised new questions about whether the two mysteries could somehow be connected.In this episode, we go back through the entire Chicago Tylenol Murders investigation, the victims, poisoned capsules, stores, suspects and theories before diving into the strange life and death of the Unknown Wanderer and the new evidence investigators uncovered after finally learning who he was.Watch the full episode on YouTube:▶ https://bit.ly/TheoriesOfTheThirdKindYTSupport the show + unlock bonus episodes:🎧 300+ bonus video & audio episodes▶ https://theoriesofthethirdkind.supercast.com

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