Matthew Poole and continuators on Acts 22:30

30 On the morrow, because he would have known the certainty wherefore he was accused of the Jews, he loosed him from his bands, and commanded the chief priests and all their counsel to appear, and brought Paul down, and set him before them.

That he might not continue, after knowledg, in that (accounted) Crime of binding a Roman Citizen; as also that Paul might speak with the greater liberty and freedom in his own defence.

The chief of the four and twenty courses amongst the Priests, according to their Families, or such as in place and dignity did excel in the Sanhedrim.