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A second case concerns Charles Whitman, the 1966 “Texas Tower” sniper who, after killing his wife and mother, opened fire atop a tower at the University of Texas in Austin, killing sixteen and wounding thirty-two, one of the first school massacres. Whitman was literally an Eagle Scout and childhood choirboy, a happily married engineering major with an IQ in the 99th percentile. In the prior year he had seen doctors, complaining of severe headaches and violent impulses (e.g., to shoot people from the campus tower). He left notes by the bodies of his wife and his mother, proclaiming love and puzzlement at his actions: “I cannot rationaly [sic] pinpoint any specific reason for [killing her],” and “let there be no doubt in your mind that I loved this woman with all my heart.” His suicide note requested an autopsy of his brain, and that any money he had be given to a mental health foundation. The autopsy proved his intuition correct—Whitman had a glioblastoma tumor pressing on his amygdala.
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Robert M. Sapolsky (Behave: The Biology of Humans at Our Best and Worst)