Season 4

In 1977, Florida nurse Deborah Clark, 23, is found brutally slain in her home; detectives unearth an affair, a jilted wife, and a web of money and power, but no true suspect. It will take 40 years and advanced DNA testing to expose her killer.

When beloved mother and sister Janora Stevens is found brutally stabbed in her Tulsa, OK, home, her family is bitterly divided and increasingly suspicious of each other. The case chills until a trail of tell-tale fibers leads cops to her killer.

When 19-year-old Tara Sidarovich goes missing from her Punta Gorda home, Florida police consider her a runaway; then her body turns up in a swamp. Shocking prison recordings will send detectives on a nationwide hunt for her killer.

When night manager Rodney Castlin is gunned down in the lobby of his hotel three weeks before Christmas, detectives scour Georgia for his killer. Two decades pass before an informant's shocking testimony breaks the case wide open.

A 2007 cold case resurfaces when a detective reopens the investigation into the brutal killing of Audrey Giannotti, 20, in rural Pennsylvania. Uncovering hidden secrets, he races against time to bring justice to a family desperate for answers.

When Susan Schwarz is found shot to death in her apartment in 1979, police suspect a robbery gone wrong. Thirty-two years pass before a witness reveals a much darker motive that breaks the case wide open and leads to Susan's killer.

A massive search unfolds in Chandler, OK, when two women and a child go missing from a Walmart parking lot in 1992. It will take 23 years and a tip from an unlikely source to piece together a heinous plot of misdirection and murder.

When the body of a woman turns up in a field in Huntington Beach, CA in 1968, police simultaneously seek a killer and the identity of the victim herself. It takes 52 years for detectives to solve this dual mystery and expose a vicious predator.

When 34-year-old Freddie Farah is gunned down in his Florida grocery store, police urgently seek his killer. Decades later, Farah's son will have a chance encounter with a cold case detective which brings the case back to life and exposes a killer.

The quiet town of Redding, CA, is rocked by the disappearance of Frank McAlister, a teen with a recent cash windfall who leaves only a blood-stained car behind. 25 years will pass before someone makes a stunning on-air confession.

In 2002, Chris Green, 19, is found beaten to death in a ditch in Michigan. The case remains cold for nearly a decade until investigators uncover a suspect whose incriminating statements blow the case wide open.

The 1964 murder of 9-year-old Marise Chiverella leaves the town of Hazelton, PA, in fear; an intense manhunt yields numerous suspects but no killer. Five decades pass before a student moonlighting as a genetic genealogist reignites the case.

When 8-year-old April Tinsley is found dead in a Fort Wayne, IN, ditch the community is shaken. Disturbing letters then appear, penned by her killer. Police scramble to catch April's murderer before he strikes again.

When 81-year-old Helen Gale is found in her burned-out car, investigators in Southfield, MI, wonder who would murder this pillar of the community. It will be eight years before a blown alibi brings them face-to face with her killer.

When 37-year-old Lee Rotatori is found dead in her hotel room in 1982, police suspect the work of a professional. It will take four decades to identify her killer and, in the process, reveal a shocking truth.

Dawn Koons, an 18-year-old model with dreams of making it big in California. Her family back in Yonkers had their concerns about her move, fearing that she might be making a mistake. Unfortunately, their worries would soon turn into heartbreak.

When nine-year-old Campfire Girl, Candy Rogers turns up dead after selling mints door-to-door, Spokane detectives launch a dogged campaign find her killer. What follows is one of the longest cold case investigations in Washington State history.