He has multiple grounds for an appeal. He had an all white jury in a racially charged case. The district attorney removed potential Black jurors during jury selection without strong, race neutral reasoning, which is called a "Batson Violation". The judge had errors in his instructions to the jury on what self defense is.
But the slave owners, they saw this kind of injury every day and they kept on hitting without ever questioning themselves?
How is that even humanly possible?