There is a long tradition of fiction drawing inspiration from actual events. Joyce Carol Oates’ short story “Where Are You Going, Where Have You Been?” was inspired by an article in Life magazine on the “Pied Piper of Tucson,” a serial killer in Arizona who lured teenaged girls into his car. Nelson Algren’s novel The Devil’s Stocking grew out of an article Algren researched and wrote on the controversial trial of Rubin “Hurricane” Carter, a boxer accused of murder. There’s no harm, then, in the fact that your novel’s main event is similar to one that happened in real life. The real concern seems to be whether you’re okay with the fact that people might think you drew your inspiration from the headlines. And that’s something only you can answer.
It’s worth noting that fiction that coincides with headlines, whether intentionally or inadvertently, isn’t inherently bad. Oates’ story and Algren’s novel aren’t any less evocative because the jumping off point came from real life. Fiction, after all, is an amalgamation of imagination, observation, and experience. Often, story ideas are triggered by compelling moments in real life—an overheard conversation, an unexpected reaction, an intriguing circumstance. Headlines and news events can be excellent triggers; they’re just more widely publicized.
Of course, it’s important to remember that interesting news events get a lot of play in the media. Talk show hosts tell jokes at their expense. Television shows stage dramatizations and reenactments. Magazines run interviews. And you don’t want your fiction to seem like just another revisiting of the event. Your story should say something fresh and interesting beyond what has already been well covered. In “Where Are You Going, Where Have You Been?” Oates fictionalized a great deal, including the creation of the protagonist, Connie, a vein teenager who is temporarily fooled by Arnold’s attempts to seem young and cool, so as to lure her into his car. In The Devil’s Stockings, Algren knew fictionalizing would give him more room to tell Carter’s story as he envisioned it. He imagined his way into Carter’s experience by creating the fictional boxer Ruby Calhoun and, as a result, the book is more about a struggle against injustice than the controversial elements of the trial. He also invented a sparring partner and was able to bring in his own knowledge about human nature, boxing, and gambling.
Since you’ve already invented the character and action, your novel is probably already quite different from actual events. If you’ve built a solid character and a strong series of actions, then the novel isn’t just about that one heroic moment. It is about the choices your character makes that lead up to and follow that moment. The events of a story are certainly important, but fiction digs beyond simply what happens, to unearth why it happens.