In 1992, when Jenn Drury learns about her father's brutal murder, her first thought is that the cult has something to do with it.

In 1995, when a 14-year-old girl in Happy Valley, Washington, goes missing, detectives uncover a grim family secret.

In 2000, in South Barrington, Illinois, a rookie cop responds to the scene of what many believe to be the site of an accidental drowning. But for that cop, something about it doesn't sit quite right. It's a hunch that, 10 years later, he still hasn't forgotten.

Lisa Reeves wasn't looking for love when she met Randy Gwathney - what she got, instead, was bloodshed.

In 2011, as the manhunt for a dangerous cop killer rages across Athens, Ga., police get a call from the man they are looking for; he's not alone and has hostages, and police fear he wants to go down in a blaze of glory.

In 1996, in Tulsa, Oklahoma, a young mother is found dead on the side of a rural stretch of highway in an apparent hit-and-run accident. But as the family grieves, the façade begins to crack, and soon the truth seeps out.

In 2005, a woman fails to show up at a Motley Crue concert and is never seen again; to this day, her friends and family wait for her killer to visit her secret grave.

In 1980, in Radford, Virginia, college freshman Gina Hall goes out dancing and never returns. Police follow her trail to a mysterious lake house, but where she goes from there is a mystery that has endured for 40 years.

When the perpetrator of a brutal shooting claims no randomness to his murders, a prosecutor must untangle fact from fiction.

Two murders, decades apart, have one terrifying man in common. In 2021, when 33-year-old Erika Verdecia goes missing, her family launches their own search for her. What their homegrown investigation uncovers is a tragic trail of bloodshed, 36 years in the making.

In 2008, a real estate developer finds his glamorous wife Kay Wenal slashed from ear to ear in her Georgia home; with few clues in the case, investigators quickly learn that all is not what it seems in her picture-perfect life. [also shown as S3:E12]

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.

In 2016, when a beloved young mother vanishes, her family - desperate for answers - makes a deal with the devil.

In 2019, when a beloved father vanishes, his home appears spotless, but there’s something odd about the flower garden.

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 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.