From international bestselling author Carolyn Arnold comes an emotional police procedural that will have Detective Madison Knight seeking justice for a fallen officer while holding herself—and those she loves—together.

A fallen officer. A shattered department. A killer still at large.

When Officer Barry Weir is shot and killed in the line of duty, Detective Madison Knight joins every officer in Stiles in the desperate hunt for his murderer. As Madison pieces together the evidence, the investigation takes her across the city, but the case is complicated by more than dead ends.

Her boyfriend—a fellow detective and Weir’s lifelong friend—is devastated by the loss, and their shared grief strains their relationship. Yet Madison refuses to let heartbreak cloud her judgment. Instead, she channels her grief into bringing Weir’s killer to justice—for Weir, his fellow officers, and the wife and three young daughters he left behind.

Every new lead raises another terrifying possibility. Was Weir the random victim of a gang initiation, the target of a calculated assassination, or is someone hunting police officers? All Madison knows is she won’t wait for the killer to strike again. She’ll stop them before another officer pays the ultimate price.

Perfect for fans of relentless detectives, realistic police procedurals, and edge-of-your-seat suspense. Readers who enjoy D. K. Hood, Patricia Gibney, and Helen H. Durrant will love this emotional crime thriller.

What readers are saying about Carolyn Arnold:

“Fans of crime fiction will be moved and enthralled by In the Line of Duty, as much an action-packed mystery as it is a heartfelt tribute to police...” — Publishers Weekly

“A simply riveting read from cover to cover, In the Line of Duty clearly reveals author Carolyn Arnold to be a master of the genre…” — Midwest Book Review