[quote]When an armed school resource officer entered the room, Pierson believed he was cornered and turned his gun on himself, Robinson said. The entire attack lasted approximately 80 seconds and was captured by security cameras.[/quote] Some idiot entered the school with a shotgun then this happened [url=http://www.denverpost.com/news/ci_24724553/arapahoe-high-school-shooting-sheriffs-office-interview-hundreds]Better source[/url]