1982 Tylenol Murders: Could the “Unknown Wanderer” Be Linked to the Killings?
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In September and October of 1982, seven people died after taking Extra-Strength Tylenol capsules purchased from stores in Chicago that were later found to be laced with potassium cyanide.
The victims of the initial incident, which included a child, were identified as: Mary Kellerman, 12, Adam Janus, 27, Stanley Janus, 25, Teresa Janus, 19, Mary Reiner, 27, Paula Prince, 35, and Mary McFarland, 31.
Kellerman was the first victim on September 29, 1982. After waking up in her Elk Grove Village home with a cold and sore throat, her parents gave her Tylenol to combat the symptoms. She passed out in the bathroom just minutes later and died after being rushed to hospital.
That same morning, 27-year-old postal worker and Arlington Heights resident, Adam Janus, took Tylenol and collapsed before being rushed to hospital, where he too died. Tragically, two of his family members would take doses of Tylenol from the same bottle that day and suffered the same fate within a couple of days of one another.
Mary Reiner and Mary McFarland, who purchased Tylenol from different stores, would also die after taking it.
On October 1, a United flight attendant, Paula Prince, picked up a bottle of Tylenol at O'Hare International Airport and was found dead in her apartment.
Based on the evidence, investigators at the time speculated that the bottles had not been tampered with during the manufacturing process but in-store while on the shelves. Whoever poisoned the bottles, they hypothesized, had purchased them for various stores in the Chicago metropolitan area, added the cyanide, and returned them to the shelves.
Those living in the Chicago metropolitan area were ordered to dispose of any Tylenol they had purchased and the company recalled more than 31 million bottles of Extra-Strength Tylenol following the deaths.
Congress passed the Federal Anti-Tampering Act in 1983, rendering the tampering of consumer products a felony. The FDA had issued tamper-resistant packaging requirements in 1982 and strengthened those requirements in 1989.
James W. Lewis, a New Yorker, was an early suspect in the poisonings. He attempted to extort Johnson & Johnson, for $1 million in exchange for the poisonings to stop. Investigators did not find any evidence connecting Lewis to the murders and he was not charged in the case. He did, however, serve more than 12 years in prison for extortion.
On December 4, 1982, a man died after ingesting a fatal dose of cyanide inside Sacred Heart Catholic Church in Boise. His body was later found by parishioners under one of the church pews. Initially, his identity was unknown, and he was referred to as "the unknown wanderer." On his person, he had $1,900 in $100 bills, two key chains with almost 30 keys, a lighter, a Seiko wristwatch, a bolo tie and a note requesting that his remains be cremated. The note was signed with a false name: Wm. L. Toomey.
Despite investigation and coverage of the case on a 1990 episode of Unsolved Mysteries, he would remain unnamed for years.
The case was eventually reopened in 2019 but it wasn't until September 2026 that the Ada County Sheriff’s Office had an answer to the question: Who is the unknown wanderer?
On one of the keys found on the man’s body was a mark that indicated it came from Jacksonville, Florida. This key would lead investigators to an address at Mills Court, Jacksonville, and became the catalyst for unravelling the mystery of the man's true identity.
Through interviews, investigators found that in 1982 a man named Betkouski owned a home at the address. According to the Ada County Sheriff’s Office, they located Betkouski's brother and compared his DNA with a sample from the Unknown Wanderer. The results confirmed that the two men shared the same father.
The unknown wanderer was officially identified as Doctor Mathew Francis Betkouski, a chemist, and a member of a prominent Los Angeles family. According to Ada County Detective Tim Cooper, evidence has been uncovered that could potentially link Betkouski to the Tylenol killings.
Detectives say they discovered that Betkouski had worked at the White Sands Test Facility in Las Cruces, N.M. and that, according to an ex-co-worker, he was fired following an incident at a local pharmacy where he was allegedly attempting to obtain capsules for a supposed experiment. According to the same co-worker, Betkouski had talked about how simple it would be to spike over-the-counter capsule medications with poison.
According to Cooper, Betkouski had suffered a traumatic brain injury in 1974 that had negatively impacted his mental health and that he had been in inpatient and outpatient care as a result. Cooper also stated that Betkouski had been struggling with schizophrenia and depression.
Amongst Betkouski's belongings, which his family had kept in his childhood room over the years, was a hand drawn map of Chicago believed to be made in the 1970s and a bottle of sodium cyanide that appeared to be manufactured at home made from the pits of peaches and apricots. Although not the potassium cyanide used in the Tylenol deaths, its presence raised questions about whether Betkouski had been experimenting with cyanide in his own time.
Although Cooper states that evidence puts Betkouski in the Chicago area in December 1981, investigators have yet to find evidence that Betkouski was in the area at the time of the attacks.
It is important to state that Betkouski has not, at the time of writing, been identified as the killer in the long-unsolved Tylenol killing case.
In a statement, Cooper said: "While our office may have identified some connection to 1982 events, we're not naming him as a suspect. Our goal today is to generate new leads to this case and possibly others."