Let's assume there was a man called Jesus and he got to be in front of the Governor....
Pilot, despite what christians say did not dither over guilt or innocence. He was a soldier and had used major force on the Jews previously. Imagine trying to rule this surly bunch who assumed they were god's people and that god would support their insurrection (despite dismal past and future failures).
He surely wouldn't have been interested at all in this know it all carpenter who claimed to be a king. Pilot was pragmatic. Keep the peace even if it costs the life of one possibly innocent man. Better to kill him than having to slaughter unknown hundreds if he let him free and the religious leaders stirred the people up on the "holy' festival day.
After Jesus said he was sent to earth witness the truth Pilot who was living evidence of the superiority of Greco/Roman knowledge and understanding (and power) asked a basic philosophical question "What is truth?"
Jesus knew that what ever his response Pilot would quickly and easily show how foolish and childish a belief in absolute truth is, so remained silent.