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One of the most disturbing details I've seen from a school shooting happened this week at Evergreen High, the top performing school in the state of Colorado located in an affluent mountain town.
A 16-year-old student (skinny white kid with pimples) opened fire during lunch. During most planned attacks, the students have semi-auto rifles, modern handguns, shotguns, or combinations of different firearms. This kid had a single revolver and a "large amount of ammo" that he reloaded multiple times as he fired both inside and outside of the school at students fleeing. While police haven't released details about the gun, it's probably a standard 6 round revolver like the one in this video.
This is so disturbing because a teenage kid started shooting at his classmates and after the first 6 shots, he had enough manual dexterity to properly unload and reload a revolver. He was so prepared to commit a school shooting that he didn't have an adrenaline dump that would cause his hands to start shaking, tunnel vision, and loss of fine movement.
Multiple studies of trained police officers under the acute stress of a shooting show memory loss, paralysis, dissociation, visual distortions, and either hyper/slow motion. In one famous example, an officer thought someone was throwing soda cans at him, but they were actually rounds being ejected from his partner's gun (Artwohl, 2002).
What is going on in the brain of a 16-year-old to be able to think and move smoothly enough to reload a revolver while shooting at his classmates?