From grieving family and friends to jilted lovers and eyewitnesses, investigators pore over every detail and discrepancy to uncover motives for murder, along with the reason for suppressing key pieces of evidence.
A newly divorced young woman goes missing and the case goes cold. Decades later, a determined FBI agent manages to break a chilling family pact wide open. (S1, ep 1)
A 77-year-old preacher's widow is stabbed to death in her apartment. Despite a bloody handprint at the scene, it takes 25 years for justice to be served. (S1, ep 2)
A woman's body is dumped beside a Wisconsin highway and detectives make little progress while pressing suspects. A shocking twist blows the case wide open. (S1, ep 3)
The execution-style killing of a salesman sends shockwaves through an Indiana town and the truth is darker than anyone could have even imagined. (S1, ep 4)
In a Denver suburb, the assistant DA is found dead in her bathtub. The case ultimately hinges on a hair found at the scene - and one man's heavy conscience. (S1, ep 5)
When a Mississippi mechanic is murdered, police encounter a series of shocking twists, a master manipulator, and an innocent pawn who pays a high price for love. (S1, ep 6)
A woman's mutilated body is found on her kitchen floor and police suspect her husband. But when an arsonist sets the town ablaze, an even darker suspect emerges. (S1, ep 7)
When a man's decomposing body is found in the California desert, it takes a wiretap, a military investigation and a stunning revelation to crack the case. (S1, ep 8)
When a student is gunned down in Wisconsin, it takes two decades, a priest's confession, and a grieving father's persistence to ensure justice is served. (S1, ep 9)
A single mother is the victim of an apparent hit-and-run in a Michigan beach town. One decade on, the truth emerges and the list of culprits just keeps growing. (S1, ep 10)
After a cheerleader's body is found next to her high school, it takes a mother's determination, a national appeal, and nearly 40 years to reach justice. (S1, ep 11)
Police link a missing person's report to an abandoned pickup truck and the search begins for Martin Byerly - a mechanic known for drinking and womanising. (S1, ep 12)
The battered body of a young woman is found at a remote campsite. While detectives soon narrow down the pool to four suspects, their stories just don't add up. (S1, ep 13)