Report pages 23–24: 26 claims on pp. 23–24 (fact 13, evidence 12, conjecture 1).
There were 19 attacks perpetrated by 20 individuals known or knowable to the targeted location as customers, clients, patients, or visitors.
There were 19 attacks perpetrated by 20 individuals who were known or knowable to the targeted location as customers, clients, patients, and visitors
All but one customer, client, patient, or visitor who perpetrated an attack was male (n = 19, 95%).
Sample (n = 19 of 20) · customer, client, patient, and visitor attackers
All but one (n = 19, 95%) customer, client, patient, or visitor who perpetrated an attack were male
Ages ranged from 23 to 66 years old, and the average age was 41 years.
Ages ranged from 23 to 66 years old, and the average age was 41 years
Over three-quarters (n = 15, 79%) of the 19 attacks were motivated, in whole or in part, by a grievance against an organization or its employees.
Sample (n = 15 of 19) · attacks by customers, clients, patients, and visitors
Over three-quarters (n = 15, 79%) of the 19 attacks perpetrated by customers, clients, patients, and visitors were motivated, in whole or in part, by a grievance
The key findings box reports that 79% of incidents were motivated by grievances.
Sample (n = 15 of 19) · attacks by customers, clients, patients, and visitors
79% of incidents were motivated by grievances
The key findings box reports that 65% engaged in concerning behaviors at the targeted location before their attack.
Sample (n = 13 of 20) · customer, client, patient, and visitor attackers
65% engaged in concerning behaviors at the targeted location prior to their attack
The key findings box reports that 60% experienced a triggering event prior to their attack.
Sample (n = 12 of 20) · customer, client, patient, and visitor attackers
60% experienced a triggering event prior to their attack
One attacker opened fire at a video game tournament shortly after losing a match, and another targeted a healthcare facility that had expelled him from a treatment program.
one attacker opened fire at a venue hosting a video game tournament shortly after he lost a match
Other grievances included frustration over being denied services, being expelled from a business, and similar perceived slights.
Other grievances included frustration due to being denied services, being expelled from a business
A gunman previously treated for PTSD at a residential treatment center took five hostages, released two, and fatally shot the remaining three employees after an eight-hour standoff. One victim had expelled him from the program two weeks earlier because he had knives and threatened to kill staff.
locked himself in a room with the remaining three victims for eight hours
Nearly two-thirds (n = 13, 65%) of these attackers engaged in concerning or threatening behaviors at the targeted location before their attack.
Sample (n = 13 of 20) · customer, client, patient, and visitor attackers
Nearly two-thirds (n = 13, 65%) of the attackers who were known or knowable as customers, clients, patients, and visitors engaged in concerning or threatening behaviors at the targeted location prior to their attack
Prior behaviors ranged from being ejected for erratic or rude conduct to threatening to harm or kill employees or other customers.
ranging from attackers who were ejected from the establishment due to erratic or rude behavior, to attackers who threatened to harm or kill employees or other customers
An attacker who opened fire in a newsroom office had harassed the newspaper's staff for years before the attack.
an attacker who opened fire in a newsroom office had been harassing the staff of the newspaper for years leading up to his attack
In the customers, clients, patients, and visitors section, percentages reflect the 20 customers, clients, patients, and visitors who perpetrated attacks.
For this section, percentages reflect those 20 customers, clients, patients, and visitors who perpetrated attacks.
A 36-year-old gunman armed with a rifle, a shotgun, and a bulletproof vest took five hostages at a residential treatment center where he had previously been treated for PTSD.
A 36-year-old gunman armed with a rifle, a shotgun, and a bulletproof vest took five hostages at a residential treatment center where he had previously received treatment for post-traumatic stress disorder (PTSD).
The attacker fatally shot the three remaining hostages before dying by suicide.
The three hostages were fatally shot by the attacker before he died by suicide.
All three victims were treatment center employees who may have had a direct connection to his prior PTSD treatment, including one who had expelled him from the program two weeks earlier because he had knives and threatened to kill staff.
All three victims were employees at the treatment center and may have had a direct connection to the attacker's prior PTSD treatment, including one victim who had expelled him from the program two weeks earlier because the attacker had knives and threatened to kill staff.
A man killed five people with a shotgun at a newsroom after an unflattering article about him. He had sued the paper years earlier, stalked and threatened employees, and mailed a dossier on the intended victims and their families before the attack.
The attacker had a personal grievance with the newsroom after an unflattering article was written about him
Over half (n = 12, 60%) of the customer, client, patient, and visitor attackers appeared to experience a specific triggering event prior to attacking.
Sample (n = 12 of 20) · customer, client, patient, and visitor attackers
Over half (n = 12, 60%) of the customer, client, patient, and visitor attackers appeared to experience a specific triggering event prior to perpetrating an attack
All triggering events occurred within one month of the attack, ranging from 2.5 hours to 2-4 weeks before the incident.
These triggering events all occurred within one month of the attack, ranging from 2.5 hours to 2-4 weeks prior to the incident
The triggers included a spouse saying they were filing for divorce, an attacker being served an eviction notice or protective order, a lawsuit dismissal, and being fired from a job.
a spouse saying they were filing for divorce
Before the attack, the attacker downloaded blueprints, recorded video of the building and access points, read textbooks on mass shootings, and studied police reaction times.
downloaded blueprints and recorded video of the newsroom building and its access points, read textbooks on mass shootings, studied police reaction times to previous attacks
Before the attack, the attacker created and mailed a dossier containing information about the intended victims and their families.
created and mailed a dossier with information about the intended victims and their families
In preparation for incarceration after the attack, the attacker sold his car and spent a significant portion of his income on a lifetime chess organization membership.
In preparation for his incarceration after the attack, the attacker also sold his car and spent a significant portion of his income on the purchase of a lifetime membership for a chess organization.
In a case example, a 38-year-old man entered a newsroom and opened fire with a 12-gauge pump-action shotgun, killing five people.
A 38-year-old man entered a newsroom and opened fire with a 12-gauge pump-action shotgun, killing five people.
The newsroom attacker had filed a defamation lawsuit against the paper six years earlier and had stalked and threatened its employees, who contacted law enforcement and developed personal safety plans.
The attacker had filed a defamation lawsuit against the paper six years earlier and had stalked and threatened employees of the paper, prompting them to contact law enforcement and develop personal safety plans.
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