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LEAD arapahoe school shooting update_00005807.jpg

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    Guard: Araphoe shooting was preventable

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Guard: Araphoe shooting was preventable

A security guard at Arapahoe High School says the school distrtict was warned about Karl Pierson but failed to act.

Guard: Araphoe shooting was preventable

A security guard at Arapahoe High School says the school distrtict was warned about Karl Pierson but failed to act.