Stella Maudine Nickell is a Seattle-area woman who was sentenced to 90 years in prison for product tampering after she allegedly poisoned Excedrin

Excedrin

Excedrin is an over-the-counter headache pain reliever, typically in the form of tablets or caplets. It contains acetaminophen , aspirin, and caffeine. Until late 2005 it was manufactured by Bristol-Myers Squibb, but in July 2005 it was purchased by Novartis, along with other products from BMS's...

 capsules with lethal cyanide

Cyanide

A cyanide is a chemical compound that contains the cyano group, -C≡N, which consists of a carbon atom triple-bonded to a nitrogen atom. Cyanides most commonly refer to salts of the anion CN−. Most cyanides are highly toxic....

, which resulted in the deaths of her husband Bruce and of Susan Chapman Snow. Her May 1988 conviction and prison sentence was the first under federal product tampering laws instituted after the Tylenol murders.

She laced her husband's medicine with cyanide, which killed him.