They defined mass shootings as either attempts to kill multiple people who are not relatives or those resulting in injuries or fatalities in public places.
Not exact matches
But the fact remains that when you look at the modern era of
mass shootings — including but not limited to the recent horrific events in Las Vegas and Orlando, Florida — there are certain common mental health factors and motives that
define the mind of a
mass shooter, according to Alan J. Lipman, Ph.D., J.D., professor at the George Washington Medical Center and founder and director of the Center for the Study of Violence in Washington, D.C.
Defining mass public
shootings to track their frequency is tricky.
The Gun Violence Archive, which tracks reports of
mass shootings —
defined as incidents where four or more people are
shot, not including the shooter — reports there have been 30
mass shooting incidents so far in 2018, including today's in Florida.
Since Sandy Hook in December 2012 we have had 1,600
mass shootings, which most researchers
define as four or more people dead or wounded.