when you first posted picture I stated that I perceived that spirit was trying to communicate with your friend. not in a negative way. My perception of a ghost and spirit are different ghosts are earth bound by their situation. spirit comes and go by their free will, never had a unfavorable encounter.only enlightenment we of the living are not the only ones who try to get ghosts to move on, spirit comes to minister to those earth bound. Your friend is not earth bound or some force in the location that you were investigating had something to do with him losing his life.Just a sad situation.prayer for him,family,friends