Man Who Died in a Boise Church in 1982 Identified as Chemist with Possible Ties to Tylenol Murders

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Brendan Smialowski | Getty Images Share on Twitter Share on Facebook Share on Pocket Idaho investigators have identified a man who died in a Boise church in December 1982 and say he may be connected to the unsolved Chicago-area Tylenol murders. The Ada County Sheriff’s Office named him as Dr. Mathew Francis Betkouski, an organic chemist, at a news conference Wednesday, Sept. 23. Officials stressed that he is not being named a suspect.

Seven people died in the Chicago area in the fall of 1982 after taking Extra-Strength Tylenol capsules laced with cyanide. No one has ever been charged with the killings. The announcement adds a name to a decades-old Idaho mystery, but it does not close the Chicago case.

For many families, the case still shapes a daily habit. The poisonings led to the tamper-evident seals now found on nearly every bottle of over-the-counter medicine, which is why even a limited new lead draws national attention.

Betkouski died by suicide from cyanide poisoning inside Sacred Heart Catholic Church in Boise on Dec. 4, 1982. For decades he was known only as the Unknown Wanderer. He carried no identification, only a wallet, nearly 30 keys, $1,900 in cash, and a typed note signed with a false name, Patch reported.

A key found among his belongings carried a hallmark linking it to a Jacksonville, Florida, hardware store, and an engraving led detectives to old property records on a street called Mills Court. Those records pointed to a surviving brother in California, and DNA comparison showed a very high probability that the two men shared the same father.

The investigation also filled in Betkouski’s background. He came from a prominent Los Angeles-area family, worked for about three years at a fragrance company, and later worked for Lockheed on a NASA-related project in New Mexico, KSWO reported. He disappeared from his New Mexico home on Oct. 15, 1982, and turned up dead in Boise about seven weeks later after apparently changing his appearance, Fox News reported.

Former co-workers told detectives he had talked about committing a perfect crime and about cyanide. Colleagues in New Mexico said he once mentioned how poison could be put into over-the-counter capsules, ABC7 Chicago reported. Investigators said he had worked in two drugstores as an undergraduate. Photos showed he had visited Chicago, but investigators believe they were likely taken in December 1981.

The limits of the new information are significant, and Idaho officials acknowledged them. Investigators said they cannot place Betkouski in the Chicago area during the final week of September 1982, when the poisonings occurred.

The chemistry does not match cleanly either. Betkouski died from sodium cyanide, while the Tylenol capsules contained potassium cyanide. “We’re not naming him as a suspect and can’t put him in Chicago,” Ada County Sheriff’s Detective Tim Cooper said, according to NBC Chicago.

Idaho officials have turned their file over to police in Chicago and Arlington Heights. Arlington Heights police said only that they had received and reviewed the information. Investigators long focused on James Lewis, who served prison time for trying to extort Johnson & Johnson but was never charged with the murders and died in 2023.

The announcement was made jointly with the producers of Unsolved Mysteries, which featured the Boise case in 1990 and is releasing a documentary on the Tylenol murders, The Hollywood Reporter noted.

The deaths began in late September 1982, when a 12-year-old girl in Elk Grove Village took Tylenol capsules and collapsed. The victims included three members of one Arlington Heights family. Millions of bottles were recalled and destroyed.

The crimes transformed how medicines reach consumers. They led to tamper-evident packaging, such as sealed caps and foil inner seals, and federal rules requiring tamper-resistant packaging for over-the-counter drugs.

Those safeguards still matter. Consumers can check that outer seals and inner foil are intact before opening a new bottle, and they should not use any medicine that looks, smells, or tastes unusual. A damaged seal or unfamiliar pill is a reason to return the product to the store or pharmacy.

For the families of the seven victims, the Idaho announcement reopens painful questions without delivering answers. Any further progress will depend on whether Chicago-area investigators find evidence tying Betkouski to the area in the fall of 1982.

There is no new safety threat tied to this announcement. The events occurred more than four decades ago, and today’s packaging rules exist because of them. Anyone who suspects a medicine has been tampered with can report it to the manufacturer, the store, and the FDA.

The case also involves a death by suicide. Anyone who is struggling can call or text 988 to reach the 988 Suicide & Crisis Lifeline in the United States. For now, the Tylenol murders remain officially unsolved, and Betkouski’s possible connection remains unconfirmed.

The Ada County Sheriff’s Office identified a man who died in a Boise church in 1982 as chemist Mathew Francis Betkouski and said he may be connected to the Tylenol murders.

No. Idaho officials said they are not naming him a suspect, and Chicago-area police have not said how they view the new information.

Investigators cannot place him in the Chicago area during the poisonings, and he died from sodium cyanide, while the Tylenol capsules contained potassium cyanide.

Seven people in the Chicago area died in 1982 after taking Extra-Strength Tylenol capsules laced with cyanide. The case remains unsolved.

It led to tamper-evident packaging, including sealed caps and foil inner seals, on over-the-counter medicines.

What should consumers do if a medicine seal looks broken?

Do not use it. Return it to the store or pharmacy and report the problem to the manufacturer and the FDA.