New Guide to Mass Shootings in America

Mother Jones has gathered detailed data on three decades worth of cases of mass shooting in the United States and mapped them, including information on the shooters’ profiles, the types of weapons they used, and the number of victims they injured and killed. The analysis covers the cases from 1982 through 2012, and the map has been updated with cases through 2013. The report concludes that mass shooting are on the increase.