The Witness by Nora Roberts

The novel follows the story of Elizabeth Fitch, a brilliant and sheltered young woman who, after a rebellious night out, becomes the sole witness to a brutal crime orchestrated by the Russian mafia. Forced into hiding under a new identity, she transforms into Abigail Lowery, a reclusive and highly skilled security expert living in a small Arkansas town. As she builds a new life, her guarded existence is challenged by the local police chief, Brooks Gleason, who is determined to uncover her secrets. The story unfolds as Elizabeth grapples with her past, navigates trust and love, and ultimately confronts the danger that has haunted her for years.