Which was done after the malefactor was put to death some other way, this public shame being added to his former punishment. See Joshua 7:25, Joshua 8:29 10:26 2 Samuel 4:12.
Related Commentaries of Deuteronomy 21:22
Deuteronomy 21:22
22 And if a man have committed a sin worthy of death, and he be to be put to death, and thou hang him on a tree: