I head about this last night on coast to coast, it seems pretty interesting.
Russian Scientist Claims to Photograph Souls (http://naturalplane.blogspot.com/2009/08/russian-scientist-claims-to-photograph.html)
"Scientists using the GDV technique say that the aura of those who die unexpectedly or violently differs from those who experience a calm death. The souls of the former remain in a state of confusion for several days and return frequently to their bodies, especially at night. Korotkov ascribes that phenomenon to unused energy retained by the soul. He suggests that the GDV technique will also have applications for distinguishing genuine psychics from frauds."
Definitely intriguing!
It'll be interesting to see where they take this kind of thing in the future.