Witches and shit

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I'm curious about some information. Maybe you guys have some info on what I want to know.
So my great great grandma (no i never knew her) was rumored to have been a witch. From the stories I've heard she probably wasn't some hippy wiccan. More likely she was into the dark arts.

>She was my Grandfather's Grandmother.
>Born in the mid 1800s
>Ohio
>Always really nice to my Grandpa
>less nice to the other family members
>kept a "larger than normal" cat which was also only friendly with my Grandpa and herself. Cat was rumored to be her familiar
>Kept a "Curio Board" on display with macabre artifacts
>One curio artifact was some kind of pump handle that was involved in a freak accident where a piece of equipment exploded and this handle flew off and killed a bystanding woman
>There's a story where she was at a family picnic and the other family members were doubting her powers. She pointed at a passing horse and carriage, which stopped dead in its tracks"frozen in time", then she pointed again and it kept on as if nothing had happened.

I want to know what she was into, if it's real, if people still practice it, etc.
Best i could find on the internet is maybe it was Appalachian Granny Magic or Pow-wow folk magic.

Can anybody help me figure out what she was into?