Mass murderers are individuals who kill multiple people in a single event or over a short period. These acts often occur in public places, such as schools, workplaces, or during social gatherings. The motivations behind mass murder can vary widely, including personal grievances, ideological beliefs, or mental health issues. The term "mass murder" is distinct from other forms of homicide, such as serial killing, where the perpetrator kills over a longer time frame. Notable cases, like those involving Anders Breivik or Stephen Paddock, have drawn significant media attention and sparked discussions about gun control and mental health awareness.