When is it right to speak of your neighbor’s sins? (Q330)
From To Be A Christian, An Anglican Catechism
I am forbidden to gossip or slander, but I must speak the truth in love to my neighbor, report crimes, advocate for the helpless, and protect the community. (Ephesians 4:15, Leviticus 19:17-18; Matthew 18:15; James 5:18-20)