Murder is defined as the unlawful or criminal, often intentional killing of a human being with malice aforethought by another person.

In psychology, murder is a serious crime that involves the unlawful killing of another person. Research on murder and other violent crimes may focus on understanding the psychological, social, and environmental factors that contribute to violent behavior, as well as the ways in which these behaviors can be prevented or treated.

There are many examples of research on murder in psychology. For example, researchers may study the ways in which certain personality traits or mental disorders may be associated with an increased risk of violent behavior, or the role of environmental factors such as poverty or exposure to violence in predicting violent behavior. Other research may focus on the psychological impact of murder on victims, their families, and the broader community.

Understanding the psychological factors that contribute to murder and other violent crimes can be an important aspect of research and theory development in psychology, and may help inform the development of interventions and policies to reduce violence and promote public safety.