person or a male(white-fella or black-fella are not to be used as it's racist, I've never heard it used this way in either way, only when one race wanted to get to know the other in a friendly way, but you shouldn't use it)
Children, I couldn't help monitoring you conversation. There's no mystery about Willie. Why, he simply disappeared. Now, let's have no more curiosity about this bizarre cover-up.