Matthew and the fate of Judas.
One the three predictions Jesus made was about the betrayal of a disciple, and that it would be better if he had not been born. Matthew tells us what happened to Judas in the aftermath of the kiss in Gethsemane. As the chief priests et al. are taking Jesus off to see Pilate, Matthew interrupts the story to tell how Judas dies (Mt. 27:3-10). The first thing to note is that not only is Peter following the action, Judas is too. Matthew is vague about this, maybe he’s thinking that Judas is outside the palace.