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.
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.
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.
In 2011, Holly Bobo is abducted from her home in rural Tennessee; the investigation goes cold for two years until a hunter makes a gruesome discovery.
In 2014, 57-year-old Nancy Pfister was discovered beaten to death in her closet in her Aspen, CO home. When items of Nancy's were found, including the key to the closet where her body was found, investigators zeroed in on who was responsible.
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.