U.S. study finds distinct patterns in single, multi‑ and mass homicides

A new analysis of U.S. homicide data published in the *Annals of Epidemiology* highlights the prominent role of intimate partner violence (IPV) in a range of lethal incidents. Researchers examined homicide cases and classified them as single‑victim, multi‑victim (involving two to three victims), and mass (four or more victims, not including the perpetrator), uncovering distinct patterns across each category.

The study found that IPV frequently precedes mass killings and is also a common factor in both multi‑victim and single‑victim homicides. Demographic and situational differences emerged among the three groups, suggesting that victims and perpetrators differ in age, gender, and relationship context. These insights are intended to guide the development of targeted prevention strategies aimed at reducing homicide rates linked to intimate partner dynamics.