Episode 1

In 2016, Tricia Todd, 33, is reported missing after failing to pick up her daughter from a babysitter; investigators find her online journal that reveals the true horror of what had happened.

Episode 2

In 1982, JoAnn Tate, 35, is stabbed to death in her home in St Louis, and her children, Melissa, 7, and Renee, 4, are left critically injured; Melissa identifies the attacker but remembers something different years later.

Episode 3

In 2000, Mike Williams, 31, vanishes while duck hunting on a Florida lake; his boat and his shotgun are found, but not his body; 17 years later, a violent kidnapping leads detectives to suspects who had been hiding in plain sight.

Episode 4

In 2011, Holly Bobo was abducted from her home in rural Tennessee. The investigation went cold for two years, until a hunter makes a gruesome discovery.

Episode 5

In 2014, Nancy Pfister's body was found in her closet. Police had several suspects but minimal evidence until they looked at her personal items.

Episode 6

Michelle Mockbee, 42, is beaten to death at work; robbery is ruled out since Mockbee is still wearing her pink sapphire ring; the case stalls until a video surfaces that blows it wide open.