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    Shooting 911 call: 'One student down'

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Shooting 911 call: 'One student down'

Police have released dispatch calls made the day of the shooting at Arapahoe high school. CNN's Casey Wian reports.

Shooting 911 call: 'One student down'

Police have released dispatch calls made the day of the shooting at Arapahoe high school. CNN's Casey Wian reports.