The stale scent of old case files lingered in the air as I sat at my desk, surrounded by the ghosts of unsolved crimes. But one case haunted me more than the others—the cold case that had eluded me throughout my career. The murder of Amelia Sinclair.

Amelia's lifeless body was discovered in the secluded alley behind a jazz club, her vibrant spirit silenced by a single gunshot. The investigation had hit a dead end, witnesses had clammed up, and evidence had evaporated like smoke in the...