Tylenol investigation

Police officer Michael Miljan inspects boxes of Extra-Strength Tylenol with Medicare Pharmacy employee Mary Butler, right, to make sure all of the product is removed from shelves on Sept. 29, 1982, in Arlington Heights, Ill. The seven deaths, from ingesting capsules laced with cyanide in 1982, represent one of the nation's biggest unsolved murder case in decades. Tylenol packages had been tampered with in Chicago-area stores, spreading fear across the country and leading to a multimillion-dollar recall.