At first, they struggle to escape. Then a torrent of blows rains down upon their bodies until their eyes cloud over in final agony. The killer shows no remorse - just a twisted need to witness each victim's last terrified moments. Public defender Rachel Wainwright is struggling to reopen a decades-old case, convinced that the wrong man is in prison. Homicide detective Deke Morgan doesn't want to agree. But if Rachel's hunch is correct, whoever fatally bludgeoned young, beautiful Annie Dawson 30 years ago could be the source of a new string of brutal slayings.

Tracy Crosswhite has spent 20 years questioning the facts surrounding her sister Sarah’s disappearance and the murder trial that followed. She doesn’t believe that Edmund House - a convicted rapist and the man condemned for Sarah’s murder - is the guilty party. Motivated by the opportunity to obtain real justice, Tracy became a homicide detective with the Seattle PD and dedicated her life to tracking down killers.

When Detective Rebecca North left her rural hometown, she vowed never to return. Her father’s apparent suicide has changed that. The official report is that retired cop Noah North shot himself, knocked over a lantern, and set his isolated cabin ablaze. But Rebecca cannot believe he killed himself. To prove it, she needs the help of Ash Haugen, the man she left behind. But Rebecca and Ash share more than broken hearts. Something darker lies between them, and the investigation is stirring it back to life.

The beautiful young woman is perfectly still, curled up in the trunk of the car, her long dark hair hiding her face. Her cotton blouse has ridden up a little, revealing two small dots an inch apart on her back. Just like the others. Guilt has kept FBI Agent Tori Hunter away from her home in Manchester Bay, Minnesota for 20 years, ever since her twin sister disappeared on the Fourth of July, when the girls should have been together. But when she receives an anonymous newspaper clipping about another missing girl, Genevieve, Tori is dragged back to the past.

When two hikers go missing within a series of daunting caves outside of Denver, Colorado, FDLE special agent Amy Larson and her partner, FBI special agent Hunter Forrest, have good reason to suspect foul play. The pair of hikers are only the latest to vanish after a rash of disappearances that’s left local law enforcement stumped. But in searching the dank caverns near the Arkansas River, the agents aren’t prepared for the horror they uncover: a muddy pit littered with corpses. Covered in bite marks. Made by human teeth.

When a man is shot in the head, Bree Taggert and her new partner, veteran detective Dana Romano, respond to the call. They break the news to the victim’s ex-wife and learn the estranged couple’s five-year-old daughter was supposed to have been with him. What starts as a murder investigation quickly morphs into a desperate search for a missing child. The case stirs memories of Bree’s own traumatizing childhood. To find the little girl, Bree will have to relive her own terrifying past.

After multiple women go missing, Agent Melina Shepard of the Tennessee Bureau of Investigation makes the impulsive decision to go undercover as a prostitute. While working the street, she narrowly avoids becoming a serial killer’s latest victim; as much as it pains her to admit, she needs backup. Enter lone wolf FBI agent Jerrod Ramsey. Stonewalled by a lack of leads, he and Melina investigate a scene where a little girl has been found abandoned in a crashed vehicle.

True crime podcaster Trinity Scott is chasing breakout success, and her brand-new serial may get her there. Her subject is Clayton Jay Pelley. More than two decades ago, the respected family man and guidance counselor confessed to the brutal murder of teenage student Leena Rai. But why he killed her has always been a mystery. In a series of exclusive interviews from prison, Clayton discloses to Trinity the truth about what happened that night beneath Devil’s Bridge. It’s not what anyone in the Pacific Northwest town of Twin Falls expects.

When the body of a woman is found hanging from a tree in her front garden, rookie Detective Morgan Brookes is first on the scene. But Olivia Potter is past saving. And when her husband and daughters cannot be traced, Morgan knows there is more to this tragedy. And then she finds them. Lying huddled together in the dark basement, each of their faces covered with a small cotton cloth, their bodies cold to the touch. But as Morgan kneels beside the family, she realizes that one of the girls is still breathing.

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.

Escaping from a madman should have been the end of her nightmare. Instead it was only the beginning...Lizzy Gardner was just seventeen when she was kidnapped by the psychopath known as Spiderman, a serial killer terrorizing her California hometown. Imprisoned and tormented for months, Lizzy narrowly escaped with her life and Spiderman vanished without a trace. But if she thought he would forget her, she was dead wrong.

Eleven years ago, the Co-ed Slayer murdered nine female students on the Oregon State University campus. Lacey Campbell barely escaped his attack, but lost her best friend whose remains were never found. As the sole surviving victim, Lacey helped send the sadistic serial killer to prison for life. Now a forensic odontologist examining teeth and bones for the state Medical Examiner, Lacey is devastated when she arrives at a crime scene and identifies the skeletal remains as her college friend’s.

At the grisly murder scene of a teen prostitute, Virginia state trooper Riley Tatum's past roars back to haunt her. When she was a teenage runaway, she was kidnapped, drugged, and left unconscious on the streets. She has no memories of what happened, only strange recurring dreams of two men playing cards. Former FBI agent Clay Bowman, Riley's old flame, is Shield Security's newest member. He's plagued by the unsolved case of a serial killer nicknamed the Shark who murdered girls as part of a sadistic poker game.

In the sleepy rural town of Painters Mill, Ohio, the Amish and "English" residents have lived side by side for two centuries. But 16 years ago, a series of brutal murders shattered the peaceful farming community. Kate Burkholder, a young Amish girl, survived the terror of the Slaughterhouse Killer but came away from its brutality with the realization that she no longer belonged with the Amish. Now, a wealth of experience later, Kate has been asked to return to Painters Mill as Chief of Police. She's certain she's come to terms with her past - until the first body is discovered in a snowy field.

While fighting in Afghanistan, Major Grant Barrett receives devastating news: his brother and sister-in-law have been murdered in Scarlet Falls, the sleepy suburb of Grant's youth. Emotionally scarred from war, the career soldier returns home on emergency leave to temporarily care for his orphaned nephew and niece. But when someone tries to kidnap the kids and their teenage babysitter, Grant knows it's not a random act... and neither were the murders.

From her small Quantico office, Special Agent Maggie O'Dell has profiled serial killers using Polaroids, faxed copies, and scraps of evidence provided by homicide detectives from across the country. She's gained a reputation for successfully profiling killers and solving crimes, without ever stepping foot at a real crime scene. Then comes Albert Stucky, and nothing will ever be the same.

In Azalea, Mississippi, the only thing steamier than the summer days are the men of the King family. When the patriarch Randall King is found dead, Detective Arabella Matthews will race the clock to stop the killer from striking again. Benton, the eldest of the King siblings, has to decide if he wants to cooperate with the feisty detective or conduct his own investigation. The more he finds out about his father - and the closer he gets to Arabella - the more he wants to keep her safe. But the killer has different plans....

At first, they struggle to escape. Then a torrent of blows rains down upon their bodies until their eyes cloud over in final agony. The killer shows no remorse - just a twisted need to witness each victim's last terrified moments. Public defender Rachel Wainwright is struggling to reopen a decades-old case, convinced that the wrong man is in prison. Homicide detective Deke Morgan doesn't want to agree. But if Rachel's hunch is correct, whoever fatally bludgeoned young, beautiful Annie Dawson 30 years ago could be the source of a new string of brutal slayings.

They dubbed him the Collector, so named for his ritual of collecting victims before disposing of them in the most heinous ways possible. FBI Special Agent Maggie O'Dell spent two years tracking him down, caught in a game of cat and mouse that left her forever marked by this killer.

FBI analyst Kassidy Bishop is assigned to the "'For You' Killer" task force after a series of sadistic murders bearing the same signature arise in different parts of the country. The homicides are both calculated and savage, occurring in different states, but bearing the same signature: the words "for you" scribbled at each crime scene. The case chills Kassidy, bringing back memories of her own encounter with a violent criminal five years earlier.

At the reading of her father's will, Maria Slade receives shocking news—as a four-year-old, she'd witnessed her prostitute mother's murder and been taken into hiding by the well-meaning preacher who'd raised her as his own. Maria remembers none of that. But now she's determined to flush her mother's killer out of hiding and discover the identity of her birth father. She heads to Tulsa, Oklahoma, where she meets Detective Bodie Scott.

Haunted by a series of horrifying and violent episodes in their past, Grace McBride and the oddball crew of her software company, Monkeewrench, create a computer game where the killer is always caught, where the good guys always win. But their game becomes a nightmare when someone starts duplicating the fictional murders in real life, down to the last detail.

Five years after the brutal slaying of her husband, software technology executive Jill Shannon is finally ready to take the next step in her life. With her wedding to Phoenix Arizona prosecuting attorney Conner Manning just eight weeks away, the only cloud on Jill's horizon is her future father-in-law's political ambitions for his son. Jill has dark secrets in her past. Secrets she can't afford to have exposed under the relentless lights of a political campaign.

Private investigator Alexandra Lovell uses computer skills and cunning to help clients drop off the radar and begin new lives in safety. Melanie Bess, desperate to escape her abusive cop husband, was one of those clients. But when Melanie vanishes for real, Alex fears the worst, and sets out to discover what happened. Using every resource she can get her hands on - including an elite team of forensic scientists known as the Tracers and a jaded, sexy Austin PD detective - Alex embarks on a mission to uncover the truth.

As a medical examiner, Samantha Owens knows her job is to make a certain sense of death with crisp methodology and precision instruments. But the day the Tennessee floods took her husband and children, the light vanished from Sam’s life. She has been pulled into a suffocating grief no amount of workaholic ardor can penetrate - until she receives a peculiar call from Washington, D.C. On the other end of the line is an old boyfriend’s mother, asking Sam to do a second autopsy on her son.

Ellery Hathaway knows a thing or two about serial killers, but not through her police training. She's an officer in sleepy Woodbury, Massachusetts, where a bicycle theft still makes the newspapers. No one there knows she was once victim number 17 in the grisly story of serial killer Francis Michael Coben. The only victim who lived. When three people disappear from her town in three years, all around her birthday - the day she was kidnapped so long ago - Ellery fears someone knows her secret. Someone very dangerous.

Twenty years ago, wild child Jessie Brentwood vanished from St. Elizabeth's high school. Most in Jessie's tight circle of friends believed she simply ran away. Few suspected that Jessie was hiding a shocking secret - one that brought her into the crosshairs of a vicious killer.

Former movie star Jenna Hughes left Hollywood for an isolated farm in Oregon to get away from fame. But someone has followed her - an obsessed fan whose letters are personal and deeply disturbing. And while Jenna's already shaken up by what she's seen on paper, she'd be terrified if she knew what Sheriff Shane Carter is investigating. It's a shocking case that started with the discovery of a dead woman in the woods. Now two more women are missing, one of whom bears a striking resemblance to Jenna...

As a teenager, Jill Shannon fell victim to her stepfather's cruel abuse. Now, as an adult, Jill's made it - she has a successful career and a solid, if not static, marriage to Detective Alex Shannon. Together they live out what seems to be a perfect life in Seattle. The vow she made as a teenager to never again be a victim lies dormant - until one day a reporter lures her to his hotel room under the pretense of an interview - and suddenly it all comes rushing back.

Jessy Sparhawk has seen firsthand how gambling can ruin people's lives. But one night, desperate for money, she places the bet that will change her life forever. Just as she's collecting her winnings, a man stumbles through the crowd, a knife protruding from his back, and crashes into her, pinning her to the craps table.