Mark 15:13

And they cried out again, Crucify him. And Pilate said unto them, Why, what evil hath he done? But they cried out exceedingly, Crucify him.

What evil hath he done? Mark leaves it out; but John gave the answer which the hierarchy finally spat out on that occasion. This demand of Pilate came late in the proceedings, at a point when it became painfully evident to the Sanhedrin that Pilate might not yield to their will at all; and this demand of the governor for the statement of a capital charge was proof enough that none of the prior allegations bore any weight at all, being nothing but false and unproved allegations inspired by envy and unworthy of the governor's further attention. In such an extremity, the Sanhedrin, under such duress that they could no longer conceal it, at last admitted the truth. As John has it: "The Jews answered him, We have a law, and by that law he ought to die, because he made himself the Son of God" (John 19:7). It was upon their statement of what they alleged as a capital crime that Pilate then yielded to the popular clamor and ordered the crucifixion; but even then, not until the priests had injected the question of Pilate's loyalty to Caesar.