“We are guided also by the teaching of St. Thomas Aquinas, who states:
If the faith were endangered, a subject ought to rebuke his prelate even publicly. Hence Paul, who was Peter’s subject, rebuked him in public, on account of the imminent danger of scandal concerning faith, and, as the gloss of Augustine says on Galatians 2:11, “Peter gave an example to superiors, that if at any time they should happen to stray from the straight path, they should not disdain to be reproved by their subjects.” (Summa Theologiae, Part II-II, Question 33, Article 4, ad 2)”
The legitimacy of capital punishment is the consistent teaching of the magisterium for two millennia
Source: Catholic Scholars Appeal to Pope to Clarify Teaching on Death Penalty