After seeing the photo, they probably never returned to that spot, fearing that the figure would come and attack them. It looks like the beginning of a horror movie, where a demonic spirit returns after being away for a while.
The Mystery of the Time Traveling Man
The man wearing sunglasses seems to come from a different time than the people around him. He is the only person wearing sunglasses and carries a small portable camera that does not belong to that era.