John's version of Peter's denial is quite similar to those of the other Gospel writers, but His revelation of Jesus' interrogation by Annas is unique. None of the other evangelists mentioned it.
18:19 Clearly Annas was the (unofficial) high priest who conducted this initial informal inquiry (cf. v. 24). He probably asked Jesus about His disciples to ascertain the size of His following since one of the religious leaders' chief concerns was the power of Jesus' popularity. Annas' interest in His teachings undoubtedly revolved around who Jesus claimed to be (cf. 7:12, 47; 19:4). Both subjects were significant since many of the Jews suspected Jesus of being a political insurrectionist.
18:20-21 Jesus affirmed that He had always taught openly. He had not promoted sedition secretly. He had no secret teaching to hide. Obviously He was not denying that He had taught His disciples privately. He was assuring Annas that His teachings were not subversive. He did not have two types of teaching, a harmless one for the multitudes and a revolutionary one for his disciples.540He invited Annas to question His hearers, not just His disciples, to determine if He had indeed taught anything for which someone might accuse Him of being disloyal. The testimony of witnesses was an indispensable part of any serious trial in Judaism.
18:22-23 The officer (Gr. hypereton) who struck Jesus was probably one of the Jewish temple police (cf. v. 3). He interpreted Jesus' response as discourteous and used it as an excuse to strike Him. The Greek word rhapismatranslated "blow"(NASB) means a sharp blow with the palm of the hand. Jesus' response to this attack was logical rather than emotional or physical. He simply appealed for a fair trial (cf. Acts 23:2-5). The man who stuck Him was not treating Him fairly. This was a case of police brutality. Jesus had shown no disrespect for Annas.
18:24 Annas could not produce anything for which the Sanhedrin could condemn or even charge Jesus. Therefore he sent Jesus on to Caiaphas. The descriptions of Jesus' hearings in the Gospels alternate between Jesus' interrogations and Peter's denials. It seems clear therefore that Annas and Caiaphas lived and interviewed Jesus in different parts of the same large residence or palace. Caiaphas had to interview Jesus to bring charges against Him before the Sanhedrin since Caiaphas was the current official high priest. John noted that Jesus remained bound as a criminal even though He had done nothing to warrant physical restraint.
John did not record what happened when Jesus appeared before Caiaphas and, later, before the Sanhedrin (cf. Matt. 26:57-68; Mark 14:53-65; Luke 22:66-71). Perhaps he omitted these aspects of Jesus' religious trial because the earlier Synoptic Gospels contained adequate accounts of them. Maybe John considered the meeting of the Sanhedrin that he described in 11:47-53 as Jesus' official condemnation.