Dating in mass
created the first open-source database documenting mass shootings in the United States.
Our research has focused on indiscriminate rampages in public places resulting in four or more victims killed by the attacker.
This is quite often attributed to the media exposure given to celebrity relationships such as Demi Moore and Ashton Kutcher - and also Madonna and Jesus Luz.
However, we can trace relationships between in the media spotlight right back to films like 'The Graduate' where Mrs Robinson seduced the younger character 'Benjamin'.
We adopted that baseline when we gathered data in 2012 on three decades worth of cases.
(It is important to note that there have been many similar indiscriminate gun rampages—resulting in fewer fatalities—that would otherwise be included in our dataset.) In January 2013, a mandate for federal investigation of mass shootings authorized by President Barack Obama lowered that baseline to three or more victims killed.
And: Explore the full data set behind our investigation.
Other news outlets and researchers have published larger tallies that include a wide range of gun crimes in which four or more people have been either wounded or killed.The interactive map below and our downloadable database have been expanded with 33 additional cases from 2013-2017.Dating back to at least 2005, the FBI and leading criminologists essentially defined a mass shooting as a single attack in a public place in which four or more victims were killed.Information on 33 additional mass shootings from 2013-2017 is included in our full data set here.
For much more of our reporting on mass shootings, gun violence, and gun laws, see our special investigations: America Under the Gun, Newtown: One Year After, and The True Cost of Gun Violence.
Explore the map for further details—we do not consider it to be all-inclusive, but based on the criteria we used, we believe that we’ve produced the most comprehensive rundown available on this particular type of violence.