Speaking on December 14th, Arapahoe Sheriff Grayson Robinson told CNN that when Pierson entered the school his “intent was evil, and his evil intent was to harm multiple individuals.”

While Pierson was able to critically wound one student, from his first shot to his last, the only life that was lost was his. Robinson said “a critical element” in this scenario was the deputy who ran toward “the noise of gunshot,” when “many would run away from it.”

Robinson said the deputy “went to the thunder,” which brought him to the library where Pierson was holed up.

On the way into the library the officer directed students to “get down” and let everyone know he was a “county deputy sheriff.”