The poisoning murders of seven Chicago residents in 1982 horrified the country - and the world at large - because they involved Tylenol, the best-selling non-prescription pain reliever at the time.
The sole suspect in the Tylenol murders has been found dead, ending hopes of convicting him for the killings that changed the way over-the-counter drugs are manufactured.
The sole suspect in the Tylenol murders was found dead in his Massachusetts home, dashing officials' hopes of one day convicting him of the murders that
With the 40th anniversary of the 1982 Tylenol case approaching, the Tribune launched an in-depth investigation into why the murders that both terrified and fascinated the country have never been solved.