Bang

The lone survivor of the a school massacre gets questioned by a detective. Violet, survives the largest school massacre in U.S. history. She is questioned by a detective in the abandoned principals office. Their true personalities escalate over the span of the interrogation. Things may not be as straightforward as they seem.
Bonus Story also included: The Night one-ten conquered two-eighty. Shane Grey's first short story, based on a true story.