A new FBI report shed light on behaviors of mass shooters before they acted out, finding most obtained a gun legally and did not have diagnosed mental health issues, points that run contrary to some popular beliefs.

A new FBI report shed light on behaviors of mass shooters before they acted out, finding most obtained a gun legally and did not have diagnosed mental health issues, points that run contrary to some popular beliefs. https://t.co/Kfz1cMuUCN

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