In early 1900's, there was a practice known as Hex in the boondocks of York County called Hex. It's a form of witchcraft, and was mainly used for cursing something. However, Hexes could be used for healing purposes.
In 1928, a man my the name of John Blymyre got sick. Really sick. And he was convinced that this was because a hex was put on him. Blymyre went to a hexer (the proper terminology for a Penna. Dutch witch is a Hex, but that gets confusing.) This hexer told him that this hex was put on him by this hexers rival, Nelson Rehmayre, and that the only way the hex could be undone was to get Rehmayre's spellbook. When Blymyre went to get the book, Rehmayre naturally refused. Blymyre got mad, grabbed Rehmayre's axe, and split Rehmayre's skull. Blymyre was convicted of second-degree murder.
The whole incident caused a big, nationwide hooplah about superstition.
Every Halloween, a local fire company gives "Hex Hollow Haunted Hay-Rides", the hay rides start as a tour of Rehmayre's Hallow, where Rehmayre lived and practiced, with re-enactments of the murder and trial.

The "Hex Murder" is a pretty big part of area folklore, and it spawned a book by Arthur Lewis titled Hex. Check it out if you get a chance.