Mass poisoner dies in prison

March 7, 1910 San Francisco, California Cordelia Botkin (pictured) dies in prison Botkin had been involved in an affair with John Dunning for three years before his wife, Mary, discovered the infidelity. Mary took their daughter and moved to Dover, Delaware, roughly 2,900 miles (4,670 km) away. John and Botkin continued their affair for some…

The first victims of the Chicago Tylenol Murders

September 29, 1982 Chicago, Illinois The first two victims of the Chicago Tylenol Murders are killed Beginning on September 29, random victims began dying after ingesting potassium cyanide-laced extra-strength Tylenol pills. The first victim was 12-year-old Mary Kellerman; six more would follow her to the grave. During investigations, it was determined each tainted bottle had…