A mass murderer is a person who kills a large amount of people (ten at least). The two subdivisions are mass killers and serial killers. A mass killer is a person who kills a large number of people in a single, continuous act. They usually go to public places where the largest concentration of people is; like schools, restaurants, museums, etc. They use semi-automatic or automatic fire weapons to kill the largest amount of people they can, and their rampage usually ends when they commit suicide or are killed by the police in cross-fire.
      A serial killer is much more planned. They can go years before getting caught. They kill a large amount of people over long periods of time. Some serial killers rape their victims before or after killing them. This page presents information on many mass murderers, including their life, crimes, confrontment with the law (if and how they were jailed), and the psychological events in their early lives which drove them to become murderers.