A Detailed Report of US Mass Shootings From 1982 to 2013

This sobering Google spreadsheet provides a record of all mass and spree shootings that have occurred in the US over the last 30 years. Aside from the usual stats — such as the name of the perpetrator, location, number of fatalities — it also includes a summary of the crime, any known motive of the killer, and whether or not they had a confirmed history of mental illness.

It’s well-sourced and updated five minutes, having unfortunately grown quite a bit over the last couple of years (coinciding with other reports that have found a decline in mass shootings despite an overall drop in crime). Needless to say, it’s a somber read, and an awful reminder of the unusually high incidence of gun massacres in this country — reasons that will be explored for another day.