In the Line of Duty

A High-Risk Crime Thriller and Police Procedural

Detective Madison Knight Book 7


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.


What to Expect in In the Line of Duty

In the Line of Duty is a high-risk crime thriller and police procedural featuring Detective Madison Knight as she investigates the shooting death of Officer Barry Weir and races to determine whether his murder was a gang initiation or a targeted hit.

Readers can expect:

  • Female detective protagonist
  • Police procedural murder investigation
  • A police officer shot and killed in the line of duty
  • Officer Barry Weir as the murder victim
  • A drive-by shooting that may not be what it first appears
  • Witnesses whose accounts contradict one another
  • A seedy underbelly of gang violence in Stiles
  • A difficult investigation with multiple possible motives
  • Questions about whether the killing was a gang initiation or a targeted hit
  • Evidence that becomes increasingly puzzling
  • The possibility that other members of the Stiles Police Department may be targeted
  • Madison racing against time to prevent further deaths
  • The emotional impact of losing one of their own
  • Strain on Madison’s personal relationships as the investigation intensifies
  • Loyalty and trust tested under pressure
  • A determined detective pursuing justice despite the personal cost
  • Escalating danger for members of the police department
  • Multiple twists and turns
  • Self-contained case featuring a recurring detective

Book Details

Genre: Crime Thriller / Police Procedural
Setting: Stiles, Michigan (Fictional City)
Series: Detective Madison Knight, book 7
Publisher: Hibbert & Stiles Publishing Inc.
Series Format: Self-contained cases featuring a recurring detective
Reading Experience: Fast-paced • Dark • Suspenseful • Twist-filled
Available In: Kindle Unlimited • eBook • Paperback • Hardcover • Large Print Edition • Audiobook
ISBN: 978-1-988353-22-7 (eBook)
ISBN: 978-1-998095-13-1 (Paperback)
ISBN: 978-1-988353-25-8 (Hardcover)
ISBN: 978-1-989706-33-6 (Large Print Edition)
ISBN: 978-1-988064-28-4 (Audiobook)
ASIN: B01HZVSQPW (eBook)

“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 who give up their lives to protect others.”

Publishers Weekly

“A hard-hitting, emotional novel.”

Goodreads review

“A slew of twists and turns along the way.”

Goodreads review

“Arnold…makes us feel a roller coaster of emotions.”

Goodreads review

“I absolutely loved this book.”

Goodreads review

“I actually could see it being a movie.”

Goodreads review

“Arnold puts words and feelings in this book that are true to life. Great writer and series.”

Goodreads review

“Brilliant as usual.”

Goodreads review

“An insightful look into the lives and losses our country’s heroes face every day on the front lines.”

Goodreads review

“This book absolutely kept me guessing until the killer was revealed.”

Goodreads review

“The twists and turns will leave your head spinning, in a good way.”

Goodreads review

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