The case of Jeffrey MacDonald, a doctor and former Green Beret captain convicted of the murder of his family, is chronicled. Interviewed: MacDonald, investigators, attorneys, relatives of the deceased.

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Over seven hundred years ago, a medieval religious order protected a vast treasure of gold, silver, precious gems, and religious relics… and then it all mysteriously vanished. For centuries, historians and fortune hunters have crossed continents searching for these ancient riches, which would be worth billions today. What happened to the secret hoard of the Knights Templar?

Thank you to our experts who contributed to this episode: Cheryl H. White, Matthew Gabriele, Ammir Hussain, J. Stephen Roberts, Tony McMahon, Anthony Pinn, and Garth Baldwin.

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Examines the 1959 slaughter of the Clutters, a Kansas farming family memorialized in Truman Capote's "In Cold Blood."

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A probe into the justice system's failure to protect society from career criminals. Focuses on the case of Richard Allen Davis who abducted and murdered 12-year-old Polly Klaas.

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A quadruple murder in Virginia Beach bar leaves detectives mystified for years.

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On Christmas Eve 1991 while riding her bike on the Big Island of Hawaii, Dana Ireland is run down, kidnapped, brutally beaten, raped, and then left for dead.

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18 year old Stacey Lannert shoots and kills her father as he is laying on the couch. She claims that she did it because of years of sexual abuse by her father. Prosecutors disagree, believing it was for financial gain because she stood to inherit almost $500,000.

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