In the fall of 1982, a simple headache turned lethal. Seven people in the Chicago metropolitan area collapsed and died after taking extra-strength Tylenol. Investigators quickly discovered a terrifying truth. Someone had systematically laced the capsules with deadly cyanide poisoning and placed them back on store shelves. The killer behind the 1982 Tylenol murders was never caught, but this tragedy sparked an immediate revolution prioritizing product safety. Johnson & Johnson enacted a massive nationwide recall. This unprecedented crisis forced the creation of tamper-resistant packaging, permanently changing consumer protection, and ensuring a sealed defense against unseen threats.