On the muddy banks of the Calumet River, a body has been found posed next to a series of mysterious glyphs and bearing wounds from a ritualistic slaying. Chicago detective Addie Bisset knows only one man who can decipher the message left by the killer: her friend Dr. Evan Wilding. A brilliant forensic semiotician, Evan decodes the etchings as Viking Age runes. They suggest either human sacrifice or righteous punishment. But to what god? And for what sins? Only one thing is clear from the disturbing runic riddles: there are more victims to come.

Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?

Everyone in the small town of Denton is searching for Isabelle Coleman, a missing 17-year-old girl. All they've found so far is her phone and another girl they didn't even know was missing. Mute and completely unresponsive to the world around her, it's clear this mysterious girl has been damaged beyond repair. All Detective Josie Quinn can get from her is a name: Ramona. Currently suspended from the force for misconduct, Josie takes matters into her own hands as the name leads her to evidence linking the two girls.

FBI special agent Mercy Kilpatrick has been waiting her whole life for disaster to strike. A prepper since childhood, Mercy grew up living off the land — and off the grid — in rural Eagle’s Nest, Oregon. Until a shocking tragedy tore her family apart and forced her to leave home. Now a predator known as the cave man is targeting the survivalists in her hometown, murdering them in their homes, stealing huge numbers of weapons, and creating federal suspicion of a possible domestic terrorism event. 

 Diamonds are no one’s best friend when the jewels in question are smuggled conflict gems. Meg Jennings and her Labrador, Hawk, have undertaken many search-and-rescue missions, but this case has an unusual twist. A Philadelphia syndicate is importing diamonds from war-torn African nations and selling them with fake certificates to Stateside dealers.

When two rookie cops are killed in a fiery crash near Richmond, Virginia, crime reporter Nichelle Clarke is sent in to investigate. But as Nichelle digs deeper into the case, she discovers this was no ordinary accident. People and evidence soon begin to disappear. Someone is one step ahead of her. A master criminal with a deadly secret, covering their tracks with ruthless efficiency. The killer will stop at nothing to keep the truth hidden. But as she draws closer to unraveling the mystery of two dead cops, Nichelle realizes that she's become the next target.

In the remote forests of Stillwater, Minnesota, you can scream for days and no one will hear you. So when the bodies of two 15-year-old girls are discovered frozen in the snow, Special Agent Nikki Hunt is sure the killer is local: Someone knew where to hide the girls and thought they would never be found. Though Nikki hasn’t been home in 20 years, she knows she must take over the case.

Florida homicide detective Maggie Novak has seen hundreds of brutal murder cases, but when she is called out to investigate the charred remains of a young woman, in what appears to be a Halloween prank gone wrong, she is confronted with a twenty-year-old secret. The body is formally identified as that of school counselor Dana Cullen, but a distinguishing mark makes Maggie look again. She believes it is the body of her school friend Rita, who perished in a fire twenty years ago. Maggie’s hunt for the truth behind the murder takes her back to a cruel high school trick.

A video of Deputy Eve Ronin’s off-duty arrest of an abusive movie star goes viral, turning her into a popular hero at a time when the Los Angeles County Sheriff’s Department is plagued by scandal. The sheriff makes Eve the youngest female homicide detective in the department’s history. Now Eve, with a lot to learn and resented by her colleagues, has to justify her new badge. Her chance comes when she and her soon-to-retire partner are called to the blood-splattered home of a missing mother and her two kids. The horrific carnage screams multiple murder - but there are no corpses.

After the devastating loss of her husband in Iraq, Morgan Dane returns to Scarlet Falls, seeking the comfort of her hometown. Now, surrounded by family, she’s finally found peace and a promising career opportunity - until her babysitter is killed and her neighbor asks her to defend his son, Nick, who stands accused of the murder.

Three Chicago women have been found strangled, embalmed, and posed as if still alive. Doubting the findings of the local PD’s profiler, the FBI calls on forensic psychologist Zoe Bentley to investigate. Zoe quickly gets off on the wrong foot with her new partner, Special Agent Tatum Gray. Zoe’s a hunter, intense and focused; Tatum’s a smug maverick with little respect for the rules.

Cady Maddix survived a brutal upbringing - emotionally scarred but hardened - with a will for self-preservation. Hunting fugitives has given her life purpose and control. But when the Deputy US Marshal returns home to care for her Alzheimer’s-stricken mother, a new case stirs old memories. Child killer Samuel Aldeen has broken out of a nearby facility for the criminally insane, and the authorities believe he was aided by accomplices, both inside and out. 

Ryder Creed and his dogs have been making national headlines. They've intercepted several major drug stashes being smuggled through Atlanta's airport. But their newfound celebrity has also garnered some unwanted attention. When Creed and one of his dogs are called in to search a commercial fishing vessel, they discover a secret compartment. But the Colombian cartel's latest shipment isn't drugs. This time, its cargo is human. To make matters worse, Creed helps one of the cartel's drug mules escape.

Ten years ago, PI Jessie Cole and reporter Ben Morrison each suffered a tragedy that changed their lives - and now these two strangers are about to share a nightmare. For Jessie, who makes her living finding missing persons, no case has consumed her more than the disappearance of her younger sister, Sophie. But left alone to raise Sophie's daughter, she realizes that solving the case has become an unhealthy obsession.

When Detective Casey White discovers the body of a beautiful teenage girl in a white nightgown near the shoreline in North Carolina’s Outer Banks, a familiar fear floods through her. Could this be Hannah, her sweet, blue-eyed daughter snatched from home 14 years ago? But it only takes one look to confirm that the girl with dark bruising around her throat is another family’s tragedy. Putting her own grief aside, Casey digs into unsolved missing child cases in the area. The victim is Cheryl Parry, one of two little girls taken during a family beach vacation nine years ago.