Or HaChaim on Leviticus 4:22/אור החיים על ויקרא ד׳:כ״ב

1 אשר נשיא יחטא, When the prince (or king) commit an error, etc. This includes a situation where the ruler acted on the basis of a decision handed down by a properly constituted court. As long as the court is not guilty of a sin-offering on account of its decision, the ruler has to bring a a male goat as a sin-offering (Maimonides Hilchot Shigegot 15,8).