are all really scared and they are locked in their classrooms. reporter: friday s chaos, saturday s disbelief. here, like my school, like the people that i know. arapahoe senior, listening to a school riadio. we heard everything as it was going on. i heard pierson. i broke down because we were friend. hi, i m carl pierson, freshman from arapahoe. he asked a question that now seems chilling. what would you like your legacy to be. concerned about his legacy even then he told friend he had big future plans, plans centered around his passion for speech and debate. his coach and mentor was school librarian, tracy murphy. he went to nationals with mr. murphy.
a gunman to march into arapahoe high school shooting another student and turning the gun then on himself. the latest information from police in colorado. they say that the gunman, carl pearson, walked in to the school with a shotgun, machete and molotov cocktails. will whiply with our affiliate hat more from a student who knew the shooter. you know, you never think it s going to be your school. he just told me they re all really scare and locked in their classrooms. reporter: friday s chaos saturday s belief. here, like my school? the people that i know? reporter: arapahoe senior, hiding in a hallway listening to a school radio. a student down in the athletic hall. i heard it was carl pearson, and i i broke down, because he s my friend. reporter: close friends for flea three years. co-captains of the speech and debate teerchlts hi, i m carl