Citizen gun ownership

In the weeks following the murder of her son, Dylan, in his first-grade classroom, Nicole Hockley co-founded Sandy Hook Promise with a mission to end school shootings. The research-informed Know The Signs programs she helped develop and launch have since taught more than 12 million people how to prevent violence and self-harm. Through these no-cost programs, Sandy Hook Promise has averted multiple school shooting plots, teen suicides, and countless other acts of violence.

In recent years, NIJ invested in several research projects to advance understanding and inform prevention of public mass shootings.

Ohio State University Since World War II, the homicide rate in the U.S. has been three to ten times higher than in Canada, Western Europe, and Japan. This, however, has not always been the case. What caused the dramatic change? Dr. Roth discussed how and why rates of different kinds of homicide have varied across time and space over the past 450 years, including an examination of the murder of children by parents or caregivers, intimate partner violence, and homicides among unrelated adults.