One of Her Own — Shawn McGuire

As Gemi Kittredge starts her morning run along Kahului Bay, she expects this will be a day like every other. A reasonable thought. Her too-busy, scheduled-to-the-minute life never changes much. Then she finds the brutally beaten body of a young woman on the beach. Worse, Gemi knows her. She just saw Heleena at the gym last night. How could she be dead? After giving her statement to the police, she listens to their vow to find the killer, but Gemi doesn't trust cops. She's still bitter about their broken promises from thirteen years ago. Determined that this case won't go unsolved, Gemi sets off on her own to hunt down Heleena's attacker. But as she gets closer to uncovering the truth, Gemi's deepest fears rise to the surface. If she's right about who the killer is, nowhere in her world is safe.