George James Trepal is an American former chemist and computer programmer who was convicted in February 1991 of murdering his neighbor Peggy Jean Carr and attempting to murder her family. by adding Thallium to multiple bottles of Coca Cola. [ Poisoning Food or Water (7 Counts).
In September and October 1982, 7 people in the Chicago area died after ingesting Tylenol [ Branded Acetaminophen (Paracetamol) ] capsules laced with Potassium Cyanide. [ Perpetrator/ Motive - Unknown ]