Theophylact of Ohrid — as excerpted in the Catena Aurea on Mark 14:53-59

“Though the law commanded that there should be but one High Priest, there were then many put into the office, and stripped of it, year by year, by the Roman emperor. He therefore calls chief priests those who had finished the time allotted to them, and had been stripped of their priesthood. But their actions are a sign of their judgment, which they earned on as they had prejudged, for they sought for a witness, that they might seem to condemn and destroy Jesus with justice.”