In NBC's Dateline episode titled, In Cold Blood, horrifying details of a Florida woman, Kim Dorsey, are recounted.

Twelve years ago, investigators unlocked a world that led to the mind of a young girl who plotted to kill her mother in their Humble home. Now, NBC’s “Dateline” has revisited the story of 48-year-old ...

The story made headlines in Texas, and it began with the murder of a beloved mother named Mary Ann Murphy. There were multiple suspects, even a confession. But as police learned more, the mystery of ...