Columbine, Virgina Tech, the Amish Schoolhouse, the Aurora Movie Theatre and recently, Newtown: All of these massacres have something in common. The first is that the perpetrators are generally struggling with mental health problems – the specific psychiatric diagnoses vary widely, and range from clinical depression to psychotic disorders. Second, these perpetrators typically kill out of revenge, either against specific individuals or groups of individuals who represent society at large. In addition, these men have often been captivated by the idea that they will become posthumously famous. Most importantly, however, what these events have in common and makes them so deadly is the use of assault rifles that were freely available for the perpetrators. In this project we conduct research and give workshops and presentations on how to make sense of, and how to respond to such events from a legal, policy and policing perspective.