Prior to discussing what serial killers do, we must identify and pinpoint what a serial killer is. We generally tend to attribute the same name for serial killers and mass murderers. This is incorrect because they are two independent and different types of killers. While both of these individuals may kill many people, the difference lies in the reason they kill and the period over which they kill their victims. An event or a build up of circumstance triggers mass murderers and causes them to act. This can be the result of a stressful situation or frustration either at work or in their private lives. For whatever reason, they may choose to use a weapon and kill people that the