Was that from the movie murder in cowets coutny
Yes.
You can read all about her and Sheriff Lamar Potts here. I grew up hearing about this since I lived in Newnan and folks still talked a good bit about it and Sheriff Potts. Also with the movie coming out in the 80's it was still a pretty big topic I guess.
http://www.brownsguides.com/blog/weird-georgia-soothsayer-and-witch-mayhayley-lancaster/