The Question and Answer section for Much Ado About Nothing is a great resource to ask questions, find answers, and discuss the novel.
Act and scene please?
Shakespeare resolves the problem of Don John by having him captured and returned for punishment. As an audience, we know he will be punished, and that's enough..... no need to know the punishment itself.
Hero is lamenting that her name is ruined over a mere accusation that has no bases in fact.