Officials believe a man found dead in an Idaho church decades ago could be linked to the 1982 Tylenol murders. On Wednesday, authorities in Idaho said Detective Tim Cooper of the Ada County Sheriff’s Office has reopened a cold case investigation in 2019, where he identified Dr. Mathew Francis Betkouski posthumously. Betkouski killed himself with cyanide more than 40 years ago and was buried without being named.
Seven people died after being poisoned with cyanide-laced Tylenol capsules in the Chicago area. The deaths prompted a broad recall of the over-the-counter pain relievers. They also gave rise to child safety caps on medicine bottles. No arrests were made in connection with the deaths, and the case remains unsolved.
The Key That Led To Florida
A key with engravings discovered alongside Betkouski’s remains at the Boise church pointed investigators toward a street in Jacksonville, Florida, where a property owner vanished in 1982. The man’s identity was confirmed through photographs and DNA analysis.
Investigators discovered Betkouski held a job at drugstores. People who knew him from work and elsewhere described his temperament as volatile, and they recalled that he was captivated by the concept of a “perfect crime”. He also reportedly told others that cyanide was a way to kill without being detected, according to authorities.
Detectives discovered cyanide in Betkouski’s desk, which appeared to be homemade and a different compound from that used in the 1982 killings, Cooper said. Investigators say Betkouski lived in five states during his lifetime, though he never resided in Illinois or near Chicago.
Photographic evidence revealed that Betkouski had traveled to the Chicago area a year prior to the killings, though it remained uncertain whether he came back the next year.
The Chicago Connection
Chicago police investigators have reached out to Idaho authorities to see if their work ties into the Tylenol murders case, according to a statement from the Chicago Police Department. The department’s statement did not state whether Betkouski is being looked at as a person of interest.
For many years, investigators pointed to a man named James Lewis as the killer, even though he was never charged. Lewis served over 12 years behind bars before dying in 2023, having been locked up for sending an extortion note to Johnson & Johnson, which made the drug at the time, demanding somewhere between $1 million and “stop the killing.”.
Investigators received a detailed account from Lewis about how the killer might have worked when he was arrested in 1982. He denied any involvement throughout.
What Betkouski’s Case Looks Like Now
The Tylenol murders killed seven people and changed how Americans bought medicine overnight. Now Betkouski’s case could be tied to that national tragedy.
Betkouski’s death carries a personal weight. He poisoned himself with cyanide, and his body was buried anonymously for decades.
“They used photos and DNA testing to confirm his identity.”
The announcement’s reference describes investigators following a deliberate process. They did not act on a guess or an unverified account. Instead, they tracked a tangible item — the engraved key — and found it linked to a record kept in Florida.
A different homemade compound was found in Betkouski’s desk, unlike the one used in the 1982 killings. The difference in the poison is significant, since it implies Betkouski may have known about the poison without using the same formula.
What Comes Next
Idaho investigators are collaborating with the Chicago Police Department to establish whether their findings tie into the Tylenol murders investigation, which remains under active examination.
No deadline exists for an answer, and these kinds of unresolved investigations rarely proceed with haste. This one has sat untouched for forty years already.
Idaho authorities are in touch with Chicago detectives, but the Chicago Police Department has not said whether Betkouski is considered a suspect.
Weighing The Evidence
No one has been charged in the Chicago killings yet, including Betkouski, who was never charged despite the case against him resting on circumstantial evidence alone.
The pieces fit together in a way that gives investigators reason for hope. A man with a history of volatility who studied poison and visited the Chicago area before the killings passed away in Idaho, carrying an engraved key that pointed to a Florida property owner who vanished in 1982.
That Betkouski’s cyanide was a distinct compound from the one employed in the 1982 killings does not erase his crime; it simply illustrates that he possessed the knowledge to manufacture poison, even if he chose not to employ the precise formula.
The account remains as it was given: a man was discovered dead inside an Idaho church, and he may have been the person responsible for the murders that led to child safety caps being placed on medicine bottles. The inquiry is still underway.
Source material: “Idaho case may be connected to the 1982 Tylenol murders, officials say,” ABC News.
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