A woman disappears on her son's fifth birthday, but her body isn't found until years later.

Two teenagers are killed on Thanksgiving night, but the suspect's story doesn't add up.

A man finds his wife murdered, and her friend raises suspicion when she searches for the truth.

A college student is murdered in her dorm and it takes decades to solve the case.

A circle of friends from a high school in Miami are about to embark on a new beginning, all heading off to college for the first time. But when one is left behind, he surprises them all with a last minute decision.

A CIA agent vanishes, and the case remains unsolved for years, until her son remembers details of the killer.

Two Buddhist followers are left to fend for themselves in the Arizona desert.

A pipe bomb left under a car nearly kills a woman.

A man is wrongfully imprisoned for 18 years.

A woman learns the truth about the man she married.

A woman is killed four days after her wedding and her husband's ex-girlfriend comes forward.

A speed skater's secret audio diary reveals clues to his disappearance.

A comic store owner is murdered on Friday the 13th.

A family many saw as 'perfect' in an All-American town experiences a tragedy that shakes their faith and family.

The investigation into the murder of former world-class speed skater Stephen Moore is recounted.

The 1994 death of Linda Curry from nicotine poisoning is investigated. Her husband, Paul, a former "Jeopardy!" champion, is the chief suspect in the case.

The 2010 murder of former York, S.C., mayor Melvin Roberts is investigated.

The 2012 murder of a mother of two at a Kentucky laboratory supply warehouse is examined.

The 1997 disappearance of Prince George, B.C., married mother-of-two Wendy Ratte is examined. Among the early theories: she was targeted by a serial killer. A sting operation in 2008, however, shed new light on what really happened.

The investigation into the 2010 disappearance of a young mother in the Pacific Northwest is recounted.

The murders of two mothers and their daughters in a Maryland suburb are investigated, and a master thief could be the key to cracking the case.

A woman's whirlwind romance leads to a bizarre mystery involving agents, spies and cryptic messages.