1.22 - Ghosts

MONKEY ISLAND, September 1986 - Not everything is as it seems, not here, nor anywhere. Ghosts are abundant here on the Island, everyone acknowledges their presence. However, it is possible to over-believe, and this photo is proof positive.

Looking quickly one might assume that they're seeing a photo of two ghosts, but closer inspection would show there to be one ghost, trailing alongside a live person. Can you tell one from the other? Hint: Only the living cast shadows.