The infamous “Tylenol Murderer” was likely a California man who died by suicide inside an Idaho church in 1982.
nypost.com
Tylenol Murderer mystery gets bombshell new update as California wanderer ID’d as potential suspect: officials
The
infamous “Tylenol Murderer” — responsible for the poisoning deaths of seven people — could be a California man who died by suicide inside an Idaho church in 1982, according to new evidence released to the public.
Officials are looking into whether Dr. Mathew Francis Betkouski, nicknamed the “Unknown Wanderer,” is the same person who laced painkillers with cyanide and killed seven people in 1982 Chicago, the Ada County Sheriff’s Office in Boise, Idaho, announced Tuesday.
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Mathew Francis Betkouski is believed to be the same person who laced painkillers with cyanide and killed seven people.
Investigators said several pieces of evidence linked Betkouski, who died by suicide via cyanide poisoning in a church, with the “Tylenol Murderer,” but noted they lacked a definitive “smoking gun” connecting the two.
Idaho investigators refused to outright name Betkouski as a suspect at this time, but have passed evidence to Chicago police.
The Unknown Wanderer- Press Conference - September 23, 2026
Cops produced multiple pieces of evidence that link Betkouski to the
Tylenol Murders, although ACSO Cold Case Detective Tim Cooper said his office lacked a major piece of evidence that would allow them to definitively name Betkouski
as a suspect.
Investigators named Betkouski as the “Unknown Wanderer” after investigators found a marking on a key the man had that matched a street in Jacksonville, Florida. When police examined property records, they discovered a property owned by a man reported deceased in 1989.
Police found his sole surviving family member in Los Angeles, his brother. He told police his brother lived in Jacksonville until he went missing the same year the “Unknown Wanderer” died, 1982. Betkouski was declared dead in absentia in 1989.
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Investigators said several pieces of evidence linked Betkouski, who died by suicide via cyanide poisoning in a church.Tylenol Murderer responsible for seven poison deaths was likely California wanderer found dead in church: officials
Officials compared DNA from the wallet of the “Unknown Wander” and the brother, which confirmed their relationship and officially confirmed Dr. Matthew Francis Betkouski, an organic chemist, was the man who committed suicide in an Idaho church in 1982.
His brother died in 2021, and Idaho police were allowed into the family home by remaining relatives. They found photos, letters, and a hand-drawn map of Chicago that police believe was made in the 1970s. A small bottle of cyanide with a handwritten label was also discovered.
But the bottle did not contain potassium cyanide, which was used in the Chicago Tylenol poisonings. It contained sodium cyanide from peach and apricot pits in what police suspect is a homemade concoction.
Investigators examined photos Betkouski took of himself in Chicago in 1981, which they initially believed to be taken in 1982. Police ultimately could not place Betkouski in Chicago within late September 1982, when 7 people took Tylenol tainted with cyanide and died. All of the victims were 35 or younger, including a 12-year-old.
Other evidence also points to a likelihood of Betkouski holding a concrete connection to the murders.
Scientists who worked with Betkouski at Lockheed Martin in 1979 said he discussed how poison could be introduced into capsules of over-the-counter medication. The company fired him in 1982 after he had an altercation at a pharmacy while allegedly trying to get pills or capsules “for an experiment.”
The police were called, and they found him conducting experiments in his home garden, investigators said.
Chicago police said they have been in contact with Idaho investigators “regarding its investigation to determine whether there is a connection to the Tylenol murders investigation, which remains an open cold case.”
Chicago’s FBI branch said there have been many claims over the past 44 years about alleged links to the murders, which are “unsubstantiated.”
“Out of respect for the ongoing, legitimate investigation, those impacted by the tragedy, and the law enforcement partners who have provided genuine support since the start, the FBI remains the lead on investigating and releasing credible information to the public once the evidence yields a true case resolution,” they told CBS.
Chicago police actually considered a man named James Lewis, who died in 2023, as their prime suspect in the murders. He allegedly sent an extortion letter to pharmacy Johnson & Johnson demanding $1 million to stop the killings. Lewis spent more than a decade in jail for the crime.
Some officials believed they even had enough evidence to charge him with the murders, CBS reported.
Betkouski has a chilling connection to City Hall.
Police said his grandfather served as Los Angeles City Council President and as interim mayor. Martin F. Betkouski served as a city council member from 1909 to 1917 and as interim mayor for a few days in 1916.
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and girls 
