The center defines a mass attack as one in which three or more people — not including the attacker — were harmed. Almost all the attacks were carried out by one person, 96% of attackers were men and the attackers ranged in age from 14 to 87.
The report noted that nearly two-thirds of attackers exhibited behaviors or communications “that were so concerning, they should have been met with an immediate response." It said these concerns were often shared with law enforcement, employers, school staff or parents. But in one-fifth of the cases, the concerning behavior wasn't relayed to anyone “in a position to respond, demonstrating a continued need to promote and facilitate bystander reporting."
The report also called for greater attention toward domestic violence and misogyny, noting that nearly half of the attackers studied had a history of domestic violence, misogynistic behavior or both.
“Though not all who possess misogynistic views are violent, viewpoints that describe women as the enemy or call for violence against women remain a cause for concern,” the report said.
About half the attacks in the study involved a business location, and attackers often had a prior relationship with the business, as an employee, a customer or a former employer. The report also noted the role that grievances like workplace disputes or feuds with neighbors played in mass attacks. About half the attacks were motivated “in whole or in part by a perceived grievance," according to the report.
“Workplaces should establish behavioral threat assessment programs as a component of their workplace violence prevention plans, and businesses should also establish proactive relationships with area law enforcement so that they may work collaboratively to respond to incidents involving a concern for violence, whether that concern arises from a current employee, a former employee, or a customer," the report read.
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