Media Push Activists’ Count of Mass Shootings
Only 21 of 355 shootings media cite meet FBI standard for mass murder
http://freebeacon.com/issues/media-push-activists-count-of-mass-shootings/
Apparently you cannot distinguish the different Definitions of Shootings, and Murders.
http://www.snopes.com/351-mass-shootings/
The claim that there were 351 mass shootings in the first 334 days of 2015 hinges on the definition of mass shooting. While it may seem like a simple task to define "mass shooting," there really is no agreed upon definition. A 2013 congressional research service report defined a mass shooting as an incident involving four or more gun related deaths:
There is no broadly agreed-to, specific conceptualization of this issue, so this report uses its own definition for public mass shootings. These are incidents occurring in relatively public places, involving four or more deaths—not including the shooter(s)—and gunmen who select victims somewhat indiscriminately. The violence in these cases is not a means to an end—the gunmen do not pursue criminal profit or kill in the name of terrorist ideologies, for example.
The same criteria (four or more deaths) was used in a 2014 study on mass shootings and the FBI used the same criteria in 2005 to define "mass murder." ShootingTracker.com, however, has its own definition of mass shooting:
The old FBI definition of Mass Murder (not even the most recent one) is four or more people murdered in one event. It is only logical that a Mass Shooting is four or more people shot in one event.
Here at the Mass Shooting Tracker, we count the number of people shot rather than the number people killed because, "shooting" means "people shot".
“The goal is to stop minimizing these acts of violence,” Weller explains. The site’s authors point to a 2012 shooting in which one person was killed and 18 people were wounded at a nightclub. Because only one person died, it was not considered a mass shooting. This June, 10 people were shot at a block party on a basketball court in Detroit; the next day, 11 were wounded when two people opened fire with a shotgun at a block party in West Philadelphia. Neither were widely referred to as mass shootings.
“Arguing that 18 people shot during one event is not a mass shooting is absurd,” the Tracker’s founders write. Medical advancements have helped save lives that would have otherwise been lost, a fact Weller believes the gun lobby benefits from. “Those gunshot victims are still just as shot and will never be the same,” he says.