Documents violence — written to inform, not to shock.
Illustrative
Overview
The Chicago Tylenol murders refer to a series of poisoning deaths in the Chicago metropolitan area in September 1982, caused by drug tampering. Victims consumed Extra-Strength Tylenol acetaminophen capsules that had been adulterated with potassium cyanide after the product reached store shelves. At least seven people died in the original poisonings. No suspect has ever been charged or convicted of the killings themselves.
The deaths
On September 28, 1982, 12-year-old Mary Kellerman died after consuming a contaminated Tylenol capsule. The following day, six more people died after taking capsules from tainted bottles: Adam Janus, Stanley Janus, and Theresa Janus (members of one family who shared a single bottle), along with Mary McFarland, Paula Prince, and Mary Reiner. Arlington Heights public health nurse Helen Jensen recovered a Tylenol bottle from the Janus household, and Cook County deputy chief medical examiner Edmund R. Donoghue and chief toxicologist Michael Schaffer determined that capsules from the bottle contained cyanide at levels far exceeding a fatal dose.
Investigators traced the tainted capsules to multiple lots and multiple manufacturing locations (Pennsylvania and Texas), and tampered bottles were found on shelves at several Chicago-area retailers, including Jewel Foods, Osco Drug, Walgreens, Dominick's, and Frank's Finer Foods locations. This indicated the poisoning occurred after the product was already on store shelves rather than during manufacturing. Johnson & Johnson, the maker of Tylenol, issued a nationwide recall on October 5, 1982, covering an estimated 31 million bottles.
Investigation and suspects
Police surveilled Mary Kellerman's home and gravesite for months at the suggestion of FBI analyst John Douglas, without result. A surveillance photograph showed victim Paula Prince purchasing tainted Tylenol, with an unidentified man visible nearby.
James William Lewis was convicted of extortion for sending Johnson & Johnson a letter demanding $1 million to stop the poisonings; he denied responsibility for the deaths and was never charged in connection with them. Investigators separately looked into Roger Arnold, who was never charged over the poisonings but was later convicted in 1984 of an unrelated killing. Both Lewis and Arnold submitted or had DNA tested against evidence from the tainted bottles in 2010, with no match found in either case. In 2011, the FBI also requested a DNA sample from Ted Kaczynski in connection with the case; he denied ever possessing potassium cyanide.
Aftermath
The poisonings prompted a wave of copycat tampering incidents nationally, some of which resulted in additional deaths and separate prosecutions unrelated to the original Chicago case. The incident led the pharmaceutical industry to abandon powder-filled capsules in favor of tamper-evident "caplets" and induction-sealed packaging, and prompted new federal anti-tampering laws. Johnson & Johnson's handling of the crisis is widely cited as a model of corporate crisis management, and the company settled lawsuits from the victims' families in 1991.
Adam Janus, Paula Prince, Theresa Janus, Mary Reiner, Mary McFarland, Mary Kellerman, Stanley Janus
Date
1980s
Location
Chicago metropolitan area, Illinois
Case status
unsolved
Case timeline
1982-09-28
Mary Kellerman, 12, is hospitalized after taking a contaminated Extra-Strength Tylenol capsule; she dies the next day.
1982-09-29
Six more people—Adam, Stanley, and Theresa Janus, Mary McFarland, Paula Prince, and Mary Reiner—die after consuming cyanide-laced Tylenol capsules.
1982-10-05
Johnson & Johnson issues a nationwide recall of Tylenol capsules, covering an estimated 31 million bottles.
1983
Chicago Tribune, at the FBI's request, publishes the address and grave location of Mary Kellerman as part of a surveillance effort targeting the perpetrator.
1984-01
Roger Arnold, previously investigated in the Tylenol case, is convicted of an unrelated murder.
1986
Three more deaths occur in separate cyanide-tampering incidents involving gelatin capsules, including Diane Elsroth in Yonkers, New York, and Susan Snow and Bruce Nickell in Washington state (Excedrin tampering).
2009
Illinois authorities and federal agents renew the investigation; Lewis's Massachusetts home is searched. Court documents released this year show DOJ investigators concluded Lewis was responsible but lacked sufficient evidence to charge him.
2010-01
James W. Lewis and his wife submit DNA samples and fingerprints; Roger Arnold's body is exhumed for DNA testing. Neither DNA sample matches evidence on the tainted bottles.
2011-05-19
FBI requests a DNA sample from Ted Kaczynski in connection with the case; he denies ever possessing potassium cyanide.
2023-07-09
James W. Lewis dies at age 76.
Best coverage
VIDEO
Kendall Rae / 1 min
Woman Passes Away After Taking Tylenol?
VIDEO
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Child Mysteriously Passes Away After Taking Tylenol
VIDEO
Kendall Rae / 34 min
The Shocking 1982 Chicago Tylenol Murders: Is The Killer Still Out There After All These Years?
People
Adam Janus
VICTIM
Died after consuming cyanide-laced Tylenol from a shared bottle.
citation on file
Paula Prince
VICTIM
Died after consuming cyanide-laced Tylenol capsules; captured on surveillance camera purchasing the product.
citation on file
Theresa Janus
VICTIM
Died after consuming cyanide-laced Tylenol from a shared bottle.
citation on file
Mary Reiner
VICTIM
Died after consuming cyanide-laced Tylenol capsules.
citation on file
Mary McFarland
VICTIM
Died after consuming cyanide-laced Tylenol capsules.
citation on file
James W. Lewis
CONVICTED
Convicted of extortion for sending a letter to Johnson & Johnson claiming responsibility and demanding $1 million; never charged or convicted in connection with the poisoning deaths, and denied responsibility.
citation on file
Mary Kellerman
VICTIM
12-year-old victim; died September 29, 1982, after consuming a contaminated Tylenol capsule.
citation on file
Stanley Janus
VICTIM
Died after consuming cyanide-laced Tylenol from a shared bottle.
In September 1982, seven people in the Chicago area died after taking Extra-Strength Tylenol capsules that had been laced with potassium cyanide after leaving the factory. The case remains unsolved as of 2026, though it led to nationwide tamper-resistant packaging reforms and federal anti-tampering laws.
Where did the crime happen?
Chicago metropolitan area, Illinois.
Who was convicted?
James W. Lewis (Convicted of extortion for sending a letter to Johnson & Johnson claiming responsibility and demanding $1 million; never charged or convicted in connection with the poisoning deaths, and denied responsibility.).
