In 2017, Jordan Hazel becomes the prime suspect in the brutal triple murder of his wife Keara, son Kayden, and daughter Jaylynn.

In 1988, a man is released from jail after a judge deems his murder confession false. For 25 years, a family's hope for justice fades, as the killer walks the streets. But one tenacious detective refuses to let this cold case go.

In 1984, a police sergeant's 12-year-old daughter goes out to deliver the local paper and doesn't return. An immediate and frantic city-wide search only turns up more questions.

One night in 1993, in Manhattan Beach, California, an officer is shot and killed during a routine traffic stop. The only witness is a young boy who is too terrified to tell police what he saw.

In 1995, a beloved mother is found raped and murdered in the accounting office where she works. The bloody body of her young daughter is nearby. But as police photograph the scene, they get the shock of their careers.

In 2004, the cat-and-mouse hunt for a serial killer targeting black females antagonizes investigators in Peoria, Ill.

In 1997, in quaint Anne Arundel County, Maryland, a detective inherits a stack of cold cases. As he begins to unravel each one, he uncovers a shocking and gruesome common thread.

When Lovetta Armistead, a beautiful and hardworking single mother in Oak Cliff, Texas, marries a new man, Gary Green, she has no idea the monster she's brought into her home.

When an Idaho woman dies of a suspected drug overdose in 1999, the case seems open and shut until her 3-year-old daughter gives a chilling statement to police. Now, that daughter wants to know why it took the police so long to believe her.

In 1995, a desperate mother in Conroe, Texas, learns the hard way that sometimes Satan takes the form of a family friend.

In 2003, a young man in Georgia shoots his father in the head sixteen times. Days later, the body of a nun is found on the side of a Virginia road. The story behind these two crimes haunts those involved to this day.

In 2003 in Burlington, North Carolina, pregnant April Greer vanishes. Her boyfriend says she left him, and her family is worried sick. No one knows that the unbearable truth about what really happened to April is the stuff of nightmares.

In rural Missouri, the body of a young woman lies dead on a deserted dirt road only days before her wedding. While investigating her death, police uncover surprising secrets in her fiance's life.

After a savage beating that nearly kills a young mother, Omaha investigators learn that she's not the only victim. They launch a relentless search for the killer and quickly realize their most crucial clue might die with their victim.

When five people vanish in 1993, cops have zero leads; seven years later, someone connected to the case starts to talk.

In 2007 in Bethany, Oklahoma, a young pregnant woman goes missing. Police desperately try to retrace her last steps, and unearth more than just the secrets she harbored.

In 1993, a family is torn apart when a mother in Jacksonville, Florida goes missing. The case stumps detectives, who believe that the truth about what happened to her is locked inside the mind of the missing woman's three-year-old son.

For two years, in Dallas, Texas, surgical patients fall victim to Christopher Duntsch, a monster with a scalpel and a medical degree. Dallas Assistant District Attorney Michelle Shughart isn't sure what to think when she is first approached with the case. Is this medical malpractice? Or an evil man with a scalpel?

In Birmingham, Alabama, a landlord approaches his rental home to inspect a broken window when he suddenly hears a crying baby. What he discovers inside will haunt two families for the rest of their lives.

For six months in 2014, a serial killer preys upon innocent victims in Los Angeles.

After a Valentine's dance in 1974, 17-year-old Carla Walker is kidnapped by a man with a gun. For 45 years, the case goes unsolved, and no one knows that the person responsible is living uncomfortably close, hiding in plain sight.

In 2011, Mother's Day in Tustin, California, looks a little different this year for high school freshman Tony Gana. His mother, Annamaria Gana, is battling stage 2 breast cancer. She says she's fine, but Tony can tell the medicine and the chemo is taking its toll. Officer Todd Hylton is called to the scene of an alleged shooting. Just moments earlier, the caller told dispatch that his mom shot him

The murders of two teen girls at a remote and scenic lookout point seem random until police uncover a web of secrets among their network of friends.

A freshman coed gets a ride from the wrong classmate.

In 2001, in Cortez, Colo., the violent murder of a gay Navajo teenager means two spirits die with him.