If he is being truthful, he was at school during the shooting, but in a separate building, inside a locked room, inside a locked closet.
After the shooting, he says he left school, rode his bike home to retrieve video equipment and rode back around 6 PM when he interviewed students gathered across a street from the school.
Seems strange that he would do this or be allowed to do so, given the investigation of a crime.
little guy was at home playing hookey