John 20:2

She runneth therefore, and cometh to Simon Peter, and to the other disciple whom Jesus loved, and saith unto them, They have taken away the Lord out of the tomb, and we know not where they have laid him.

Several things of consequence come to light in this verse. First, John deferred to the leadership of Peter, mentioning him first, thus confounding the theory of the Gospel's being anti-Petrine. Not only was Peter mentioned first here, but "the other disciple whom Jesus loved" makes it apparent that the same designation belonged to Peter.

Also, it is important to note that the apostles had come back together again after being scattered; and the ready availability of Peter and John to receive Mary Magdalene's notification confirms the deduction already mentioned that many of the disciples, in respect of the holy days, were but a very short distance from the cross and the grave. Also, Peter's denial had not resulted in his rejection by the other apostles.

We ... Mary Magdalene's use of the plural pronoun suggests that she had asked others where the body was but had received no information. It is possible that in searching out the place where Peter and John were, she might have encountered others, none of whom could tell her about the missing body and the empty grave.