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The original was posted on /r/todayilearned by /u/GlitteringYams on 2024-04-27 07:27:34.

Original Title: TIL, in his suicide note, mass shooter Charles Whitman requested his body be autopsied because he felt something was wrong with him. The autopsy discovered that Whitman had a pecan-sized tumor pressing against his amygdala, a brain structure that regulates fear and aggression.