Years later, long after Laura had left me, I tried to understand the cause of my rage and learned that 70 percent of all head-injured people experience explosive anger or constant irritability following their accident. Not coincidentally, a significant proportion of that group end up in prison. There was a clear link between violent crime and brain damage. In a New York Times article, Daniel Goleman referenced two studies involving twenty-nine murderers on death row across four American states, which found that almost all had evidence of a serious brain injury that may have triggered their
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