John 18 - NKJV Woman's Study Bible

18:15 Peter and another disciple stayed, but the others fled. The identity of the unnamed disciple is uncertain. He is often connected with Joseph of Arimathea (who gave his new, stone-cut tomb for Jesus’ body). Nicodemus may have been the one, for he helped Joseph prepare Jesus’ body for burial. Tradition holds that John himself was the disciple. Whoever this unnamed man might have been, he was well known to the high priest.

18:28 While the Sanhedrin could pronounce death, only the Romans could carry out the execution. Jesus was led from Caiaphas to the Praetorium, or “palace of the Roman governor,” which was probably located next to Herod’s palace. The members of the Sanhedrin, however, would not enter the Praetorium (the governor’s residence), where Jesus was mocked by the soldiers before he was crucified, lest they be ceremonially defiled. If defiled, they could not eat the Passover.