Mass Killing

Japan faced with questions about security as knife attack leaves 19 dead

Because such massacres are rare, Japan has become overconfident about its safety, a Japanese criminologist said.

The momentum of massacre: Study finds high-risk of repeated mass-killings within two weeks of events

Mass killings in the United States may be contagious, according to a study released on Thursday that found each deadly tragedy can increase the likelihood that another will soon follow.

Understanding gunman Aaron Alexis and other mass shooters

We’re fascinated by the primal violence of the mass shooter because of we know each of is complicit in the pain others experience—and fear someone might make us pay for it.