What did Pontius Pilate and Herod Antipas have to do with the death of Jesus?

A:In the Gospels of Matthew, Mark and John, Pontius Pilate alone tried Jesus and sentenced him to death, although most unwillingly.

In the Gospel of Luke, Pontius Pilate was asked by the religious authorities to try and sentence Jesus but, being unwilling to sentence an innocent man and learning that Herod Antipas was in Jerusalem, sent Jesus to Herod to be sentenced. Herod, in turn, was unwilling to sentence Jesus and so left Pilate with this terrible responsibility.