CREEPY: The White Witch of Rose Hall (Season 3 Ep. 44)

The White Witch of Rose Hall in Jamaica is said to be a woman named Annee Palmer.  It is said that she practiced black magic, tortured slaves and killed three of her husbands.  Even after death, Annee is said to haunt the grounds of the old mansion.  But is any of it true?  Annee Palmer was a real woman in the 19th century, but what is fact and what is fiction?  Was Annee really a witch?  Or something else.