why doesn't george report tom's murder to the authorities?

George knows that a white man will never be punished for murdering a black slave.

"George saw, at once, the force of this defiance. There was not a white person on the place; and, in all southern courts, the testimony of colored blood is nothing. He felt, at that moment, as if he could have rent the heavens with his heart's indignant cry for justice; but in vain."