There are new developments in the strange and sad story of a double murder in Harnett County.
Francis Brewington and her great-grandson were found dead after a fire destroyed their farmhouse last week.
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Now, the Harnett County Medical Examiner says smoke eventually killed them, but that someone stabbed the woman before the fire even started.
Her grandson and two of his friends have admitted to plotting the woman's death, allegedly for her insurance money.