37 So Pilate said to Him, "You are a king then?" Jesus answered: "As you say, I am a king; for this I was born. And for this I came into the world, to testify to the Truth. Everyone who is of the Truth hears my voice." 38 Pilate says to Him, "What is truth?"Apparently the question was rhetorical; he didn’t wait for an answer.
Barabbas
Upon saying this he went out to the Jews again and says to them: "I find no crime in him at all.Comparing John with Luke 23:4-12 it appears that between verses 38 and 39 here Jesus was sent to Herod. Notice that Pilate declares Jesus to be innocent.