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Idaho Identifies Tylenol Suspect as Betkouski, Confirms DNA

By Drooid · Sep 23, 2026, 11:49 PM UTC · How we work

Summary

Betkouski Identified Suicide

Idaho investigators identified Boise’s “Unknown Wanderer” as Dr. Mathew Francis Betkouski, an organic chemist.
Detective Tim Cooper linked a key found on Betkouski to a Jacksonville, Florida property, leading to DNA confirmation.
Forensic psychiatrist Dr. Park Dietz said Betkouski is a viable suspect in the 1982 Chicago Tylenol murders.
Betkouski died by cyanide suicide inside Boise’s Sacred Heart Catholic Church on Dec. 4, 1982.

Summary

Mayor Byrne Bans Tylenol

The FDA mandated tamper-resistant packaging for over-the-counter drugs after the 1982 Tylenol poisonings.
Congress enacted the Federal Anti-Tampering Act in 1983, making product tampering a federal crime.
Chicago Mayor Jane Byrne banned citywide Tylenol sales, prompting a nationwide recall.
Public health officials tested thousands of bottles and created a new cyanide detection method.
More than 40 years later, the Tylenol murders remain unsolved and under active investigation.

Summary

Sheriff Holds Press Conference

Ada County Sheriff’s Office will hold a live press conference on September 23, 2026 at 10:00 a.m. MT.
Terry Dunn Meurer, co-creator of Unsolved Mysteries, will speak with Sheriff Matt Clifford at the conference.
Idaho News 6 and the Ada County Sheriff’s Office will livestream the event on YouTube and Facebook.
The conference will address whether Arlington Heights Police Department is sharing evidence with Idaho investigators.

History

Historical Context

After seven Chicago residents died from cyanide-tainted Tylenol capsules in 1982, the FDA required tamper-resistant packaging for all over-the-counter drugs, a change driven by Johnson & Johnson’s recall. Over four decades later, Idaho detectives Tim Cooper and forensic psychiatrist Park Dietz are re-examining the case, focusing on Dr. Mathew Betkouski as a possible perpetrator.

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Betkouski Identified Suicide

Idaho investigators identified Boise’s “Unknown Wanderer” as Dr. Mathew Francis Betkouski, an organic chemist.
Detective Tim Cooper linked a key found on Betkouski to a Jacksonville, Florida property, leading to DNA confirmation.
Forensic psychiatrist Dr. Park Dietz said Betkouski is a viable suspect in the 1982 Chicago Tylenol murders.
Betkouski died by cyanide suicide inside Boise’s Sacred Heart Catholic Church on Dec. 4, 1982.

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