US Mass Shootings, 1982-2012: Data From Mother Jones' Investigation
The full data set from our in-depth investigation into mass shootings.
Since we began our investigation into mass shootings following the attack in Aurora, Colorado, in July 2012, we've heard from numerous academic researchers, legislative aides, and others wanting access to our full data set. Here it is below, including links to sources where available. You can also download this data in CSV, XLS, or TXT formats, or click here for the Google spreadsheet view. (Unfortunately, the embedded version below does not support expanding the cells to see the full text in some places, but you can access it these other ways.)
Update, 2/27/13: We've dug up additional information on the shooters' weapons, now reflected in the data set below. More details and our updated analysis are in this story. For additional context and analysis from the investigation, click here, and for our entire series on gun laws, the NRA, and mass shootings, click here.