So this item at the Romanesko blog at Poynter actually pulls in the comments of the person who wrote the caption for the "finding" photo. Guess what? According to that information, groceries were floating around the street where that photo was taken. Hmmmm, maybe it wasn't a racist caption after all? I don't know for certain, as the information I have is still he said she said. The caption writer could have just made it up to cover up a major faux pas.
The point being, practice skepticism.