Idaho Sheriff's Office Identifies 'Unknown Wanderer,' Linking Him to Tylenol Murders Investigation

Investigators in Idaho have identified a man who died of cyanide poisoning in a Boise church in 1982, a development that may shed new light on the infamous Chicago Tylenol murders.

The man, known for decades as the "Unknown Wanderer," has been identified as Dr. Mathew Francis Betkouski, an organic chemist with a background in discussing cyanide and poisons, the Ada County Sheriff's Office announced Wednesday.

Investigators stated they have not placed Betkouski in Chicago during the week of September 1982 when seven people died after consuming cyanide-laced Tylenol capsules, and they are not identifying him as a suspect in those killings.

Forensic psychiatrist Dr. Park Dietz, who consulted on the original Tylenol investigation and reviewed the evidence related to Betkouski, suggested a strong connection. He noted that groups of forensic psychiatrists, psychologists, and criminal profilers who were anonymously presented with information about Betkouski overwhelmingly considered him a viable suspect.

Betkouski died on December 4, 1982, in Boise, carrying no identification. Authorities determined the cause of death to be cyanide poisoning. The mystery endured for over four decades until investigators traced one of nearly 30 keys found on his person to Jacksonville, Florida, where Betkouski had resided. DNA recovered from his wallet and later compared to a sample from his brother helped establish his identity.

Investigators uncovered several details that linked Betkouski to the Tylenol case. A former colleague recalled Betkouski discussing the concept of a "perfect crime" and cyanide. Another scientist remembered Betkouski suggesting that poison could be introduced into over-the-counter capsules. Authorities also discovered a map of Chicago and a bottle of sodium cyanide among belongings kept at his family's Los Angeles home. However, investigators emphasized that the poison found was sodium cyanide, not the potassium cyanide used in the Tylenol murders.

Photographs indicated that Betkouski had visited Chicago, but investigators determined these photos likely dated from December 1981. They could not establish that he returned to the city when the poisonings occurred.

Betkouski had disappeared from his New Mexico home on October 15, 1982, and was found deceased in Boise seven weeks later, apparently having altered his appearance.

Authorities have shared their findings with investigators in the Chicago area and are seeking any information regarding Betkouski's movements and communications in 1982. "This isn't over," Ada County Sheriff Matt Clifford stated.