title: The challenge of preventing spree killings.
authors.forename: John H M
authors.initials: JH
authors.lastname: Crichton
mesh_terms: D000293:Adolescent; D000328:Adult; D058445:Bullying; D002170:Canada; D003237:Connecticut; D005389:Firearms; D006708:Homicide; D006801:Humans; D008297:Male; D054527:Mass Casualty Incidents; D009042:Motivation; D012934:Social Isolation; D013405:Suicide; D014481:United States