As research for a story idea (which, if written, I’ll probably be releasing under a pseudonym, though it may be as transparent as Gareth Pattinson) I’ve seen the legend of the Cropsey (or Kropsy) Maniac cited as inspiration for more than one story. Amongst these films, and one which I watched last night, is The Burning a by-the-numbers but entertaining summer camp slasher which actually calls its killer Cropsy.
The film Cropsey is a documentary about the legend and how it collided with reality in a bunch of child disappearances on Staten Island. The film’s website has more information. I can’t find any other mentions of the legend online except in relation to the film- here’s the Wikipedia article about it– which seems a little odd.