Updated Dec. 15, 2013, 10:07 a.m.
The student who opened fire at a Colorado school Friday and wounded another student intended to harm more people before killing himself, police said.
Karl Halverson Pierson was armed with a shotgun he purchased legally, a machete, three explosive devices and extra ammunition when he entered Arapahoe High School, Arapahoe County Sheriff Grayson Robinson said, according to the Associated Press. He fired six shots off a pump-action gun, directly hitting 17-year-old Claire Esther Davis before turning the gun on himself, all just 80 seconds after he arrived at the school.
“His intent was evil,” Robinson said. “And his evil intent was to harm multiple individuals.”
Pierson, a member of the school’s debate team, was possibly seeking retribution against the school’s debate coach, who was also the librarian. He was disciplined in September by his target, though the reason remains under investigation. Pierson also threatened the debate…
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