As Christina Hildreth unwittingly helped Shawn Grate clean up his first crime scene, she didn't realize what she was doing. Once police were banging on her door while she was trapped with a madman, she understood the situation was direr than she realized.

Teri Knight spent weeks driving cross-country, desperately searching for the secret her ex-husband, Manuel Gehring, took to his grave. It took years before a stranger finally solved the mystery that haunted Teri ever since learning Manuel died in prison.

When Shirley Furgala helped her mother, Betty Lou Beets, drag a dead body to the yard and bury it, she knew her own life might be in danger if she refused to help. What Shirley didn't know was this wouldn't be the last time her mother would ask for help.

Jessi Toronjo went to a sleepover in 1989 thinking her stepbrother, Jeffrey Pelley, was at his senior prom. She spent the next 13 years believing someone else committed the unspeakable crime of that weekend, only to discover she knew the killer all along.

When Vickie Webb's son warned her the police might seek him out, she wasn't surprised. He had been a troublemaker for years, but she sensed this time was different. Vicki's love for her son will face the test when he is accused of the ultimate evil.

When Wilda Gadd married Howard Willis, she dismissed the rumors about him. That is until she found herself wired up and risking her life to find the dismembered bodies of his victims. She discovered that his secret life was darker than any rumor.