After 10 people at a Colorado supermarket were gunned down this week, a question familiar in America’s cycle of bloodshed began to echo: Does mental illness drive mass shootings?

The 21-year-old suspect arrested in the rampage, the second in a week, was almost immediately described by family members as paranoid and antisocial. And on Thursday, his defense attorney asked for a mental health assessment “to address his mental illness.”

But researchers and advocates say the rush to cast blame on a mental illness is misplaced.

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