On July 12, 1982, seven people in the Chicago area died after ingesting Tylenol capsules that had been laced with cyanide. The killings caused widespread panic and led to a nationwide recall of Tylenol products. The incident led to the introduction of tamper-proof packaging laws for over-the-counter medications. Despite an extensive investigation, the perpetrator was never caught, and the case remains one of the most infamous unsolved murders in U.S. history. The tragedy also had a significant impact on the Johnson & Johnson brand and its corporate reputation.