Natalee Holloway Disappearance. May 2005. Heading off to an island in the Caribbean with friends and classmates for her high school graduation trip ought to have been a dream come true for an 18 year-old girl from Alabama. And it was until the final day.

Natalee Holloway Disappearance. May 2005. Heading off to an island in the Caribbean with friends and classmates for her high school graduation trip ought to have been a dream come true for an 18 year-old girl from Alabama. And it was until the final day.

Mary Bell. In 1968, an 11 year-old girl in England is charged with two murders. The victims were 4 and 3 years-old. She had been in trouble many times previously for her abusive behavior but nothing was ever done about it. Could her unhappy home life,

Mary Bell. In 1968, an 11 year-old girl in England is charged with two murders. The victims were 4 and 3 years-old. She had been in trouble many times previously for her abusive behavior but nothing was ever done about it. Could her unhappy home life,

The Norfolk Four. In 1997, the young wife of a Navy man is sexually assaulted, stabbed, & strangled to death in her apartment in Norfolk, Virginia. Over time, eight different men would be charged with the crime.

The Norfolk Four. In 1997, the young wife of a Navy man is sexually assaulted, stabbed, & strangled to death in her apartment in Norfolk, Virginia. Over time, eight different men would be charged with the crime.

The Zodiac Killer Hoax of 1986. Thomas Henry Horan returns after publishing two books on the Zodiac killer. Both set out to show just how this serial killer of the late 1960's was nothing more than an imagined character.

The Zodiac Killer Hoax of 1986. Thomas Henry Horan returns after publishing two books on the Zodiac killer. Both set out to show just how this serial killer of the late 1960's was nothing more than an imagined character.

Robert Pickton. One of the worst serial killers in North American history, Robert Pickton was a pig farmer who looked for women to bring back to his farm to torture and kill from the mid 1990's until the early 2000's.

Robert Pickton. One of the worst serial killers in North American history, Robert Pickton was a pig farmer who looked for women to bring back to his farm to torture and kill from the mid 1990's until the early 2000's.