Only Ann KnowsA Horrible Accident or Brilliantly Planned Social Statement Ann Miller still grieves deeply five months after her son and only child was killed during the Virginia Tech mass shooting. A lifelong gun rights advocate, she works passionately as an executive for a gun rights organization, the American Rifle Society. One morning, Miller opens an anonymous package containing an AK-47 assault rifle sent to her ARS department. Entering an executive boardroom to deliver the assault weapon to her boss during a departmental meeting, two handgun shots ring out and she sprays 50 bullets in a matter of seconds killing 13 of her colleagues. Two FBI agents with vastly different personalities and investigative approaches lead the ultra-high-profile investigation to determine if the mass shooting was a horrible accident as Miller contends or a brilliantly planned and executed mass murder to bring worldwide attention to the destructive capability of automatic and semi-automatic weapons like killed her son. As the FBI's investigation fails to uncover evidence that Miller pre-planned the shooting, the ARS spins the mass shooting events to characterize Miller as a mentally ill woman hellbent on avenging her son's death. Having killed everyone in the boardroom, Miller stands trial for 13 first-degree murders as both the perpetrator and only witness. A surprise piece of evidence surfaces at the end of the trial which renders a verdict but still leaves questions unanswered.