John chapter 20 tells how Peter and John rushed to the empty tomb early Sunday morning after Mary Magdalene had visited the tomb and seen that the guards were gone, the seal broken, the stone moved from the entrance and the body of Jesus gone. She said to the disciples they have taken him, perhaps thinking it was the Jews or the Romans or grave robbers who took the body leaving the grave clothes.Peter and John run to the tomb, John out runs Peter and looks in, but when Peter arrives he goes directly in, as only Peter would do. John follows, they both see the grave clothes close up, but something sparks John's faith and he writes that he believed (in the resurrection of Jesus). So, what element of the grave clothes sparked John's faith? The head napkin, which is reported as in place and folded. More correctly, it was a head cloth that was wrapped around the head of the dead in a turban like manner. It was a separate piece from the burial shroud which covered the body. Unlike the Lazarus who was raised from the dead (and whose home the disciples stayed in at the being of the week (at least before Palm Sunday), the resurrection of Jesus did not require the unwrapping (or loosing) of the living body from the grave clothes. What John is saying, as best I can tell from my studies, is that the head turban was intact and in place, but empty. The resurrected Savior did not need to have someone (or even an angel) unwrap his grave turban to be loose from death. In his resurrected and glorified state Jesus just passed through the cloth, much like latter he passed through the closed door to be with the disciples. Jesus was the first fruit of the resurrection which is something very different then being brought back to life, like Lazarus, where the body is still bound by nature and still faces death.This is my take on why John reports that the folded napkin caused him to believe Jesus was resurrected and not that someone (they) had taken the body.