Parents of Minor Child v. Charlet,
It dealt with the victim telling the priest of the sexual abuse. The victim sued the priest and the diocese over them not reporting the abuse. The victim revoked the privilege in the civil case. The priest and the diocese refused to testify because of how Louisana law is written both the priest and the person giving the communication can invoke the privilege. The diocese and priest said that it is canon law not to divulge the communication ever except within the priesthood. The court just last year ruled that because of how the law is written that the priest and the diocese are prevented from providing testimony.
Actually very interesting that case went to the court of appeals twice for two separate issues. At one time the court actually ruled that the mandatory reporting was unconstitutional but that was overturned.