The ghost chaser then accepts the suggestion and through the activity of their own mind teleports a photon manifestation into the premises and is sometimes actually able to photograph outlines of that very manifestation that originated as a thought. This is why we see situations such as Amityville where after the people moved out and sold the house to another family, the ghosts moved out as well. The ghosts were not residents of the house, they were residents of the minds of those residing in the house. There are and they are for real. They do not manifest in such a physical way as to be running through hallways late at night etc.
Ghosts are simply the product of self hypnosis.
The knowledge of an event that happened in a particular location, becomes a suggestion of a presence to a very sensitive and open person. That suggestion as a form of self hypnosis then becomes a physical manifestation which can sometimes be photographed as it is teleported from the mind into the ether. Consider those who see strange movements around the Sun at Lourdes and other places where the Virgin Mary is said to appear. Some people see them and some don't. It depends on the degree of sensitivity, and acceptance of the individual.