This one I'm actually thinking is photo shopped. Several reasons:
#1 - Its in the context of a paranormal group photo.
#2 - Nobody is noticing anything.
#3 - There is absolutely no EXIF information in the image, meaning it was edited in something.
#4 - There is an artifact in the brightness around the image. I believe it to be the crop outline of the overlayed area. See here where I've zoomed in on that area, and brought the brightness values up so that it highlights the area of shading.