An upset student opens fire in a school cafeteria, killing eighteen of his classmates.This student is best identified as a

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Quizplus · Accepted Answer

A mass murderer is someone who kills four or more people in a single incident, typically in one location, which fits the description of the student's actions. Serial murderers kill over a longer period with cooling-off periods between murders, and spree murderers kill at two or more locations with no cooling-off period between murders. Sadistic murderers are characterized by taking pleasure in the suffering of their victims, which is not specified in the scenario.

An Upset Student Opens Fire in a School Cafeteria, Killing