'Chief Priests and Elders' in the Bible

AND Jesus having gone into the temple, the chief priests and elders of the people came to him as he was teaching, and said, By what authority do you do these things? and who gave you this authority?

And while he was yet speaking, behold, Judas, one of the twelve, came, and with him a great multitude, with swords and clubs, from the chief priests and elders of the people.

Then Judas, who betrayed him, seeing that he was condemned, repenting, returned the thirty shekels of silver [$16.80] to the chief priests and elders,

And when he was accused by the chief priests and elders he answered nothing.

But the chief priests and elders persuaded the people to ask for Barabbas, and to destroy Jesus.