Mother Jones report on copycat mass murders. Identifies 74 copycat cases for Columbine alone. http://www.motherjones.com/politics/2015/09/mass-shootings-threat-assessment-shooter-fbi-columbine …pic.twitter.com/vDzTNz9QD3
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One thing about the Mother Jones copycat report: social media virality is important but it's enmeshed with mass media sensationalization.
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