Albuquerque, N.M., mail carrier Marilyn Gandert disappears for days and no one knows where she has gone; when her body is found in the desert, detectives must find the murderer, and they only have a few witnesses beyond Marilyn's family members.

When devoted mother Danielle Pruett goes missing in Tazewell, Virginia, police launch an investigation to find her. But when her lifeless body is discovered in an open field, what starts as a web of lies and deceit becomes a race to track her killer.

Ryne Zahner is an inspiration to his high school math students in Arizona. His friends see him as one of the nicest people they know. When a hooded murderer guns him down after a night of partying, the entire community struggles to grasp his murder.

Agnes Bram, an 82-year-old Middleton, Wis., woman is found murdered in her garage; as detectives develop their case, a city-wide manhunt follows, and investigators must curb public hysteria by ensuring the killer will not kill again.

Steven Begay is a loving uncle whose nephews see as a protector. So, the irony could not be greater when his bloody body is found near a playground in New Mexico. A manhunt ensues leaving police with a major discovery that turns the case on its head.

When the battered body of Bianca Rainer, mother of two young girls, is found in rural Arkansas, the police have just one unusual clue, a puzzle piece found stuck to her body. But they know if they find the missing puzzle, they will find her murderer.

Maurice Goins, a friendly neighbor who provides meals to other tenants in his apartment complex, is found murdered in his bedroom. The case goes cold, until Lakewood, Ohio police suddenly receive a tip and the investigation is thrown into overdrive.

Steven Galvin is dead; now, bodycam video captures the detectives' hunt for his killer; as the case unravels, a surprise witness turns the case on its head; and a play by play of the crime reveals new evidence that brings the killer to justice.