Dr DeChenar AP Photo

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Dr. C. de Chenar, Austin pathologist who performed the autopsy on a sniper-slayer Charles J. Whitman, uses a chart of the human brain to pinpoint the location of the brain tumor he discovered in Whitman, shown in Austin, Aug. 2, 1966. De Chenar said the tumor was about the size of a pecan and affected the sensory passages and could have caused intense pain.

Photo Credit: The Associated Press