When 41-year-old waitress Peggy Carr succumbed to a mysterious illness in October 1988, doctors in Alturas, Florida struggled to figure out what was wrong with her. As other members of Peggy’s family became sick too, one neurologist came to suspect they were dealing with a case of poisoning. Tests soon confirmed the family had been deliberately poisoned with the rare heavy metal thallium, but no one could understand why.
