JimG:
In fact I doubt that any abuser has confessed his sin in the confessional. That is why I think that all attempts by the civil authorities to compel breaking the seal of confession is useless.
I am not surprised. In order to confess sexual abuse, the abusive priest would have to admit he committed the sexual acts, admit they were wrong, and promise never to do them again. Sexual abusers are often in some denial that they even do these acts, and to the extent they admit such actions they usually don’t see them as wrong or sinful, and are unlikely to promise never to do them again.