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The Chicago Tylenol Murders: 7 Deaths, Still Unsolved | Illinois Unsolved
Episode 50
Published 3 weeks ago
Description
On September 29, 1982, 12-year-old Mary Kellerman took Extra-Strength Tylenol for what seemed like an ordinary cold. Within hours, she was dead.
Before the next few days were over, seven people across the Chicago area would die after taking Tylenol capsules that someone had secretly laced with cyanide. The victims had no apparent connection to one another. They were simply people reaching for medicine they trusted.
For Episode 50 of Kat Has Questions — released on the 44th anniversary of the murders — we’re returning to Illinois for one of the most infamous unsolved crimes in American history.
We’ll reconstruct the first terrifying hours of the poisonings, the discovery that connected the deaths, the panic that followed, and the massive investigation to find whoever was putting poisoned medicine onto store shelves. We’ll also examine the two men who drew some of the most serious suspicion, including James Lewis — the man who demanded $1 million to stop the killings, but was never charged with murdering anyone.
Decades later, investigators reopened the case, conducted an elaborate undercover operation, and tested evidence for DNA. Still, no one has ever been charged with the seven murders.
The poisonings changed medication packaging, federal law, and the way Americans think about product safety forever.
But one question remains:
Who poisoned the Tylenol?
This is Episode 50 of Kat Has Questions — Illinois Unsolved: The Chicago Tylenol Murders.
Stay curious.
⸻
Sources & Further Reading
CBS News Chicago — PainKiller: The Tylenol Murders
CBS News Chicago — Chicago Tylenol Murders 40 Years Later: Unraveling One of the Country’s Most Infamous Crimes
CBS News Chicago — Tylenol Murders: Chilling FBI Interviews With Prime Suspect James Lewis Released After His Death
CBS News Chicago — Chicago Tylenol Murders 40 Years Later: Suspects and Persons of Interest
WTTW Chicago / Chicago Stories — Inside the Tylenol Murders
WTTW Chicago — Who Committed the Tylenol Murders? After More Than 40 Years, the Case Remains Unsolved
WTTW Chicago — The Reporters Who Followed the Tylenol Murders Over Decades
Federal Bureau of Investigation — Chicago Field Office History: The Tylenol Murders Investigation
United States v. James William Lewis, 797 F.2d 358 (7th Cir. 1986)
Chicago Magazine — The Chicago Tylenol Murders: An Oral History
U.S. Food and Drug Administration — Milestones in U.S. Food and Drug Law: Tamper-Resistant Packaging Regulations
U.S. Department of Justice — Federal Anti-Tampering Act / Tampering With Consumer Products
United Press International Archives — Contemporary reporting from the Chicago Tylenol investigation, September–October 1982
The Washington Post Archives — Contemporary reporting on the 1982 Tylenol poisonings and investigation
Gallardo, M. (2026, September 24). Cross-country cold case leads detectives to Chicago-area Tylenol murders. ABC7 Chicago. https://abc7chicago.com/post/idaho-cold-case-announcement-wednesday-unknown-wanderer-could-include-possible-tie-chicago-area-tylenol-murders/19861451/
Miller, V. (2026, September 23). Idaho authorities present new lead on Tylenol murders tied to recently identified man. Chicago Sun-Times. https://chicago.suntimes.com/crime/2026/09/23/tylenol-murders-new-lead-idaho-man
Tenenbaum, S., Assad, S., & Savini, D. (2026, September 23). Boise’s “Unknown Wanderer” is identified after 43 years. Could he be linked to Chicago Tyle
Before the next few days were over, seven people across the Chicago area would die after taking Tylenol capsules that someone had secretly laced with cyanide. The victims had no apparent connection to one another. They were simply people reaching for medicine they trusted.
For Episode 50 of Kat Has Questions — released on the 44th anniversary of the murders — we’re returning to Illinois for one of the most infamous unsolved crimes in American history.
We’ll reconstruct the first terrifying hours of the poisonings, the discovery that connected the deaths, the panic that followed, and the massive investigation to find whoever was putting poisoned medicine onto store shelves. We’ll also examine the two men who drew some of the most serious suspicion, including James Lewis — the man who demanded $1 million to stop the killings, but was never charged with murdering anyone.
Decades later, investigators reopened the case, conducted an elaborate undercover operation, and tested evidence for DNA. Still, no one has ever been charged with the seven murders.
The poisonings changed medication packaging, federal law, and the way Americans think about product safety forever.
But one question remains:
Who poisoned the Tylenol?
This is Episode 50 of Kat Has Questions — Illinois Unsolved: The Chicago Tylenol Murders.
Stay curious.
⸻
Sources & Further Reading
CBS News Chicago — PainKiller: The Tylenol Murders
CBS News Chicago — Chicago Tylenol Murders 40 Years Later: Unraveling One of the Country’s Most Infamous Crimes
CBS News Chicago — Tylenol Murders: Chilling FBI Interviews With Prime Suspect James Lewis Released After His Death
CBS News Chicago — Chicago Tylenol Murders 40 Years Later: Suspects and Persons of Interest
WTTW Chicago / Chicago Stories — Inside the Tylenol Murders
WTTW Chicago — Who Committed the Tylenol Murders? After More Than 40 Years, the Case Remains Unsolved
WTTW Chicago — The Reporters Who Followed the Tylenol Murders Over Decades
Federal Bureau of Investigation — Chicago Field Office History: The Tylenol Murders Investigation
United States v. James William Lewis, 797 F.2d 358 (7th Cir. 1986)
Chicago Magazine — The Chicago Tylenol Murders: An Oral History
U.S. Food and Drug Administration — Milestones in U.S. Food and Drug Law: Tamper-Resistant Packaging Regulations
U.S. Department of Justice — Federal Anti-Tampering Act / Tampering With Consumer Products
United Press International Archives — Contemporary reporting from the Chicago Tylenol investigation, September–October 1982
The Washington Post Archives — Contemporary reporting on the 1982 Tylenol poisonings and investigation
Gallardo, M. (2026, September 24). Cross-country cold case leads detectives to Chicago-area Tylenol murders. ABC7 Chicago. https://abc7chicago.com/post/idaho-cold-case-announcement-wednesday-unknown-wanderer-could-include-possible-tie-chicago-area-tylenol-murders/19861451/
Miller, V. (2026, September 23). Idaho authorities present new lead on Tylenol murders tied to recently identified man. Chicago Sun-Times. https://chicago.suntimes.com/crime/2026/09/23/tylenol-murders-new-lead-idaho-man
Tenenbaum, S., Assad, S., & Savini, D. (2026, September 23). Boise’s “Unknown Wanderer” is identified after 43 years. Could he be linked to Chicago Tyle