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Wednesday morning, September 29, 1982, 12-year-old Mary Kellerman of Elk Grove Village, Illinois died after taking a capsule of Extra Strength Tylenol. Adam Janus of neighboring Arlington Heights died in the hospital shortly thereafter. Adam's brother Stanley of the suburb Lisle, Illinois and sister-in-law Theresa died after gathering to mourn his death, having taken pills from the same Tylenol bottle. It was determined that they had all died of cyanide poisoning. The medical examiner determined all of these death were
What is homicidal?