Details are starting to emerge in the aftermath of yesterday's deadly shooting at the Washington Navy Yard in D.C., a military administrative headquarters. Though at first, authorities were on the lookout for two other men suspected of being part of the attack, which killed at least 12 (possibly 13) and injured eight, now they have reported that the shooting was the work of only one man.
The suspected gunman, who died in the attack, has been identified as a 34-year-old man named Aaron Alexis. While we don't know very much about the psychology of rampage violence, we do know that it's quite common for perpetrators to die in a mass shooting incident--almost half do. A recent study in the journal Justice Quarterly highlighted significant differences between mass shooters who survive their attack and those who die.
Adam Lankford, an associate professor of criminal justice at the University of Alabama who studies mass shootings, performed a statistical analysis of a 2010 New York City Police Department report that attempted to encapsulate all "active shootings," defined as one person killing others in a well-populated confined area, between 1966 and 2010. The study refined the data to only include U.S. shootings in which two or more people were killed or injured. That resulted in a total of 185 mass shooters--including both workplace and school shooters.
"Unlike most murderers and terrorists, mass shooters almost never escape the scene of their crimes," Lankford writes. Mass shooters died in 48 percent of the attacks studied, 38 percent by their own hand and the remaining by "suicide by cop"--using weapons to intentionally provoke police, who are trained to shoot and kill in life-threatening situations.
Here's what else Lankford found in the patterns of mass shooting cases:
- 96 percent of mass shooters were male.
- An average of 3.22 victims were killed and 3.83 wounded. (Note: Though the FBI doesn't classify someone as a mass murderer unless he kills at least four people in one location, Lankford classified a mass shooting as anything more than two people.)
- 32 percent of mass shootings happened at schools. Public, commercial locations (like restaurants or a mall) accounted for 23 percent of attacks.
- For every additional person the shooter killed, his own likelihood of dying was 1.2 times higher. The number of people wounded was not a statistically significant predictor.
- For every additional weapon the shooter carried, he was 1.73 times more likely to die. (Three were found on Alexis's body.)
- Shooters who attacked people at a factory/warehouse or at a commercial location were more likely to die than those who carried out an attack somewhere in the study's "other" category of locations, which was anything NOT classified as a factory/school/commercial space/office. Factory attackers were almost eight times more likely to die.
"Patterns among offenders, the weapons they use, the victims they kill, and the locations where they attack may have significant implications for law enforcement officials," Lankford concludes. "Simply from the information police receive from 911 dispatchers while racing to the scene of a mass shooting—such as the offender's number of weapons, number of victims killed, and decision to attack at an open commercial site, factory, or warehouse—they may be able to prepare for the increased likelihood of a shootout or offender suicide on site."
Read the full study for free here.
Thank you, Shaunacy for a simple statement of the facts.
Recently we have begun categorizing these kinds of attacks to distinguish the family eliminators and other types of rage events from the disgruntaled ex-employee attacks. The higher rate of death among the murderers in industrial settings is interesting and correlates to the motive for the "workplace violence" events -- "taking those XXXX with me!"
I wonder if there's a correlation to the number of available victims, since if he's still shooting when the police arrive, they're more likely to end the situation quickly as possible.
Good information. That works out to about 13 deaths per year on average due to a mass shooting. For comparison, deaths per year on average for the following:
81 from tornadoes
40 from skiing or snowboarding
35 from lightning strike
21 from dog attacks
13 from mass shootings
7 from spider bites
6 from snake bites
And the scary one:
32,000 from automobile accidents
While at first it appears an automobile is the villian, it is in fact the smartest of animals on planet Earth driving those cars the be the problem.
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