Mark 15:4

And Pilate again asked him, saying, Answerest thou nothing? Behold how many things they accuse thee of.

There was an extensive interview between Jesus and Pilate recorded by John, but omitted here, the extreme likelihood of just such an occurrence adding corroboration to John's account. In John's Gospel, it is clear why Jesus answered nothing. First of all, it was unnecessary in the light of all absence of any proof of the Sanhedrin's charges and the further fact that Herod too had agreed upon Jesus' innocence. In the second place, Pilate was of a strong mind to have released Jesus, and there is no doubt that Christ could easily have persuaded him to do so. Also, he could have performed one little miracle and have scared the wits out of the pagan governor. Here, more than anywhere else, the act of Jesus laying down his life of his own accord is in view.