Decades-old Tylenol Murders May Link to New Cold Case Findings
WHO:
Fox News - The man identified as the "Unknown Wanderer" is Dr. Mathew Francis Betkouski, an organic chemist.
NBC News - Detective Tim Cooper works in the Ada County Sheriff's cold case unit.
NBC News - Dr. Park Dietz is a forensic psychiatrist consulted during the original Tylenol investigation.
WHAT:
Fox News - Dr. Park Dietz stated, "It's an extraordinary thing to have been around at the beginning in 1982, and now today in 2026, to see very likely closure."
NBC News - Detective Tim Cooper expressed interest in learning more about Betkouski's movements between October 15 and December 4, 1982.
Fox News - Betkouski died from cyanide poisoning on December 4, 1982, inside Sacred Heart Catholic Church in Boise.
NBC News - Seven people died after taking Tylenol capsules laced with cyanide in 1982.
NBC News - The Ada County Sheriff's Office believes Betkouski may have a possible link to the Tylenol murders.
NBC News - The sheriff's office has turned findings over to investigators in the Chicago area.
WHERE:
Fox News - The identification of Betkouski was announced by the Ada County Sheriff's Office in Boise, Idaho.
NBC News - Betkouski was found dead in a church in Boise, Idaho.
NBC News - Betkouski had lived in Jacksonville, Florida, prior to his death.
WHEN:
Fox News - Betkouski disappeared from his New Mexico home on October 15, 1982.
NBC News - The wanderer case was reopened in 2019.
NBC News - The sheriff's office case will be featured in an documentary on October 9.
WHY:
Fox News - Investigators are exploring Betkouski's possible connection to the Tylenol murders due to his history of discussing cyanide and poison.
NBC News - Betkouski had a history of volatility and struggles with mental illness, which may have contributed to his actions.
HOW:
NBC News - Authorities found a bottle of sodium cyanide among Betkouski's belongings, which was determined to be homemade.
Fox News - Investigators identified Betkouski through DNA recovered from his wallet and compared it with a sample from his brother.
NBC News - A detective found an engraved key among Betkouski’s belongings that led to his identification.
NBC News - Authorities found a map of Chicago and a bottle of sodium cyanide among Betkouski's belongings.
(UPDATED September 24, 2026 04:59 UTC)
Dr. Park Dietz remarked on Fox News that it's extraordinary to witness what appears to be closure on a case that began in 1982. Meanwhile, Detective Tim Cooper shared with NBC News his desire to investigate Betkouski's movements between October 15 and December 4 of that same year. Authorities have also discovered a homemade bottle of sodium cyanide among Betkouski's belongings, adding another layer to the ongoing investigation.
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(UPDATED September 24, 2026 01:22 UTC)
The Ada County Sheriff's Office has identified the man known as the "Unknown Wanderer" as Dr. Mathew Francis Betkouski, an organic chemist who died from cyanide poisoning in 1982 inside Sacred Heart Catholic Church in Boise, Idaho. Investigators are now exploring Betkouski's possible connection to the infamous Tylenol murders, as he had a history of discussing cyanide and poison, and they discovered a map of Chicago and a bottle of sodium cyanide among his belongings. The sheriff's office has turned its findings over to investigators in the Chicago area, and the case will be featured in a documentary on October 9.