When John White got to Roanoke, it was a deserted island with nothing but trees, grass, and water. Some facts include that John white came with 117 colonists, he set sail on April 26, 1587, and his goal was to establish a new colony.
Sir Richard Grenville left 100 men on the island and left to get supplies, Sir Francis Drake stopped at Roanoke and the other colonists left with him because they grew tired of waiting for John to retourn.
I believe, that the colonists starved to death or were lost at sea. I believe this because there might have been a region in drought and the colony might have suffered from a massive food shortage. Another theory would have been that the Croatians were shot and killed may have been searching for food.