Is the story of the Marlboro Slaughterhouse in New Jersey true?

It sounds like there might have been a grain of truth in there somewhere, but it's all been greatly exaggerated and embroidered over the years - as many ghost stories are, from constant re-telling. Having checked out a few websites with photos from the Marlboro Slaughterhouse on them, all I can say is that it looks like the kind of place which, even if it's not haunted, probably should be!