i try to debunk it but i couldn't ,so it's got me puzzled and i do belive it is a ghost that was the first pic and the second you can see the spirit leaving it leaves a trail behind then the 3rd pic it's gone.
it is a unique pic but i couldn't explain it or even debunk it the investigators was taking pics of the place and they caught a couple good pics and that there wasn't anything that would cause a light glare.the place was very active that night.
Are you sure that all of this is supposedly a ghost manifesting? I mean, part of it on the white part of the door way looks plausibly like a ghost, most of it does, but some of it looks a little bit like a reflection.
If this is an kind of a lens flare, I just say its the most unique one I've ever seen. Do you have some background of this shot? What was seen when the picture was taken. Very unique.