In this article, the authors analyze the characteristics of mass murderers and their motivations through a systematic review of the literature. They found that most mass murderers are male, aged between 20-30 years old, with a history of mental health problems or substance abuse. The majority of perpetrators plan their attacks in advance and use firearms. The study also explored the motivations behind mass murders, finding that they are often driven by a desire for notoriety, revenge, or to right a perceived wrong. Many mass murderers experience a sense of pleasure or satisfaction from the act of killing. The authors identified several risk factors for mass murders, including violent behavior, substance abuse, and exposure to violence at an early age. They suggest that mental health professionals should be involved in early intervention and treatment to identify individuals at risk, and the media can play a role in reducing the risk of mass murders by avoiding sensationalized reporting. The study's findings have implications for preventing mass murder incidents.