Just as trials for blacks, whites, reds, greens etc today are paid for by the county prosecuting the case (at least here in GA). And with few exceptions, the codes cited above criminalized actions by blacks (rape, muder, arson etc) that were ALSO illegal when performed by whites.
Again, this is a far cry from the original assertion (see post #95) that a slave-owner could murder their slave with impunity and be renumerated for their loss.