Read the following sentences: “Some questions were finally answered when a woman recognized the shark in pictures from the subway as the same shark her kids had taken pictures of that same day, after it had washed ashore on Coney Island, a beach at the bottom tip of Brooklyn. Her neighbor’s daughter had even picked up the corpse for a photograph. Images of the shark hanging in the air, held by a brown-haired girl in sunglasses, began to appear online, corroborating the woman’s story.”
What does “corroborating” mean?