{Thou hast said} (su eipas). This is a Greek affirmative
reply. Mark ( Mr 14:62 ) has it plainly, "I am" (eimi). But
this is not all that Jesus said to Caiaphas. He claims that the
day will come when Jesus will be the Judge and Caiaphas the
culprit using the prophetic language in  Da 7:13  and  Ps 109:1 .
It was all that Caiaphas wanted.