Rampage Killer

A Spree Killer or Mass Murderer is a person who kills multiple people in a short period of time, with no cooling off period. There are only minor differences between the two terms, as detailed below.

Definition
The spree killer has usually become alienated from society and no longer feels any connection with the rest of humanity. They may feel that the world has come crashing down on them and that the only solution is death. They will feel that their own lives are over, and aim to take as many people with them as they can.

Subjects of this type most often either commit suicide or force law enforcement to use deadly force against them ("suicide by cop"). They prefer death over the thought of being lock away forever.

The mass murderer, while being nearly identical, differs in the fact that their murders will occur in one place. A spree killer may "visit" multiple locations.

Victimology
Both types may target a certain demographic, or even specific targets. This may include fellow students who gave the subject a hard time, a college professor who gave them a bad grade, or a group of bullies. The Columbine Massacre is a perfect example.

Spree Killer

 * Aileen Wournos
 * Howard Barton Unruh

Mass Murderer

 * Charles Whitman
 * The Columbine Killers

Criminal Minds

 * George Foyet, The Reaper ("Omnivore")