Tawana Brawley redux!
If the accusation is bogus but charges are brought anyway, and the prosecutor manages to get an all-black jury, he might be able to get convictions (which would be overturned on appeal)...sort of a reverse of To Kill a Mockingbird...but I doubt they will be able to exclude all whites from the jury. Not that there aren't black people in Durham who would do an honest job as jurors, but the prosecutor could try to make sure none of them were selected.