A young couple dead. A haunting echo of one boy's darkest day. A detective who can't walk away—even if it costs him everything.

Detective Jake Cashen is called to a quiet cul-de-sac on the edge of Blackhand Hills, where a teenage girl has discovered the victims of a brutal murder-suicide. Newlyweds, shot in their own home. It looks open-and-shut. But something about the scene feels wrong—and Jake can't shake the eerie parallels to his past.

The case dredges up memories of his own parents' deaths under the same circumstances. His father snapped. His mother paid with her life. End of story. But as Jake digs deeper into the present-day investigation, he finds unsettling threads that lead straight to the tragedy that defined his childhood. And when he pulls the long-buried file from his parents' case, he discovers details no one ever told him—details that make him question everything.

Jake's relentless search for the truth in both cases puts him at odds with his boss, his new partner, and the only family he has left. But someone out there knows the real story. And they'll kill to keep it buried.

Their Deadly Truth is the heart-pounding ninth installment in the Detective Jake Cashen Crime Thriller Series by former police detective Declan James. Perfect for fans of Michael Connelly, C.J. Box, Robert Dugoni, and Lisa Regan.