After an apparent brazen home invasion during the holiday season in a quiet Connecticut community leaves Connie Dabate dead, investigators discover a silent witness that cracks the case wide open.

When a nurse is gunned down in her home, detectives initially believe they have a clear suspect, but new information leads them down a completely different path. Josh Mankiewicz reports.

A young Fairfield, Ohio, woman, 21-year-old Katelyn Markham, vanishes one summer night in 2011, prompting her community to conduct a massive search. When her skeletal remains are found in Indiana two years later, investigators question her friends and family to uncover her killer, but it takes 12 years and a detective with dogged determination.

In Marietta, Georgia, a woman's murder shines a light on an unsolved mystery from years earlier. As the connection between the two cases becomes clear, a long-hidden truth surfaces. Could a master manipulator be behind both crimes? Andrea Canning reports.

Millionaire entrepreneur Lance Herndon is found bludgeoned to death in his Atlanta home. The search for his killer reveals no shortage of suspects or secrets.

After Gary "Big Daddy" Farris mysteriously disappears, his family discovers his remains on their sprawling 10-acre estate. An investigation reveals a family deeply divided by jealousy and greed, but did one of them kill Big Daddy?

30 years later... On October 25, 1994, Susan Smith reported that her two young sons had been taken by a carjacker. Everyone was looking for the two young brothers. For nine days, hearts went out to their poor parents. What came next was unimaginable.

A West Virginia pharmacist is left widowed after her husband, 38-year-old Michael Cochran, suddenly dies. Their close-knit neighborhood rallies around the family until troubling details emerge regarding the couple's new business venture.

College student Anita Knutson is found stabbed to death. The case took years and the unwavering commitment of loved ones and investigators to reach a resolution.