No, nor on purpose. :)

While a community is being terrorized by a sadistic BTK-style serial killer, a regular parishoner asks a clergyman to speak in pastoral confidence. The clergyman agrees. During their talk, the man identifies himself as the killer. The clergyman tells him to surrender to the police, but the man refuses and leaves. Does the clergyman have a duty NOT to reveal the man's identity to the police?