(6/26/2001) More than 300 years after the Salem witch trials led to the death of 19 innocent people, psychologist Linnda Caporael has been searching for a rational explanation for the symptoms of bewitchment. Her work has sparked an investigation into wrenching convulsions, vivid deliriums, contaminated crops, hallucinogenic drugs, and a 2,300-year-old murder victim buried in a bog. Was bread tainted by a toxic fungus the real cause of the symptoms in Salem? Is this the same fungus from LSD is derived? Can history's devastating witch hunts finally be explained?