Hmm... well I know Joaquin Oliver was shot in the head, but he was in the hall and I don’t think anyone was around him when it happened. I think it must of been a male student who was shot in a classroom. Luke Hoyer, Martin Duque, Peter Wang, and Joaquin Oliver were all shot in the hallways. That leaves the only male students who were shot inside of classrooms were Alex Shackter and Nicholas Dworet. Alex Shacter was killed with a shot to the torso, so that rules him out. if this kids best friend was killed next to him (which means it happened in a classroom) and shot in the head, (and I’m just assuming his best friend was male) it was most likely Nicholas Dworet. If you’re question was to who the kid who witnessed the murder is, then I have no idea.