I think what make this photograph controversy is that the kids on the right seem to be having a bleeding nose. Some people may argue that the kid who has a bleeding nose is the younger one, and his brother, the kid on the left, is the one who caused it. And as you can see the kid on the left is also stronger than the kid on the right. Others may argue that the kid one the left is not scared or anything, so he just hit his nose by him self.
Sally Mann, https://www.sallymann.com/new-gallery-1/