US Secret Service study: Most students who committed deadly school attacks over the past decade were badly bullied, had a history of disciplinary trouble and their behavior concerned others but was never reported.

US Secret Service study: Most students who committed deadly school attacks over the past decade were badly bullied, had a history of disciplinary trouble and their behavior concerned others but was never reported. https://t.co/gXSrrAUde0

— NBC News (@NBCNews) November 9, 2019