Boise police have identified the "Unknown Wanderer," a man found dead in a church in 1982, and have revealed a possible connection to the unsolved Chicago Tylenol murders. The Ada County Sheriff's Office has not confirmed whether the man, Dr. Matthew Francis Betkouski, was present in Chicago during the final week of September 1982, when the poisonings took place. However, they have shared evidence with Chicago police. Betkouski was discovered dead in Sacred Heart Catholic Church on December 4, 1982, with no identification, but with a range of personal items, including a hand-drawn map of Chicago, photos of him in the Chicago area, and a bottle of homemade cyanide. His fingerprints did not match any records, and investigators traced his bolo tie to a silversmith in the Southwest, but that did not yield a name. A 1990 episode of "Unsolved Mysteries" generated tips but no leads. Detective Tim Cooper identified Betkouski through a key from a hardware store in Jacksonville, Florida, which led to property deeds and a family member in Los Angeles. DNA testing confirmed Betkouski's identity. He came from a prominent Los Angeles family and had a documented fascination with chemistry and explosives. Betkouski moved to Jacksonville in 1975 and was fired from his job there in 1978 after mental health issues. He later worked at Lockheed in New Mexico, where he was fired in March 1982 after an altercation at a local pharmacy. Police found evidence of experiments in his home garden. Personal items found in Los Angeles after Betkouski's brother died included photos, letters, and a hand-drawn map of Chicago, as well as a bottle of cyanide. The bottle contained sodium cyanide, not the potassium cyanide used in the Tylenol murders. However, testing found peach and apricot pits, suggesting it was homemade. Police believe Betkouski had an interest in visiting Chicago, and some photos were taken in December 1981, though it is unclear if he returned for subsequent trips. Boise police have shared their findings with Chicago police, who have reviewed the information. The Chicago Tylenol murders, which occurred in September 1982, resulted in seven deaths. The prime suspect, James Lewis, died in 2023. While the connection between Betkouski and the Tylenol case remains unproven, the discovery of his identity and the evidence found with him have provided new insights into this long-closed chapter of American history.