Here in the U.K there is no priest penitant confidentiality enshrined in Law. So here it comes down to what is the moral duty of the Elder/s when something unlawful comes to their attention.
I had to point this out to our P.O at the time over a case of child abuse , he was(is) a "society" man and leaned more on what the WT says, which of course is U.S biased.
He went away and checked up, and came back to me to tell me I was correct, but that confidentiality was still of the utmost importance to the congregation .
The perpetrator is still free to re-offend. He has moved congregations, another can of worms, is he properly monitored there, and in F.S ? I doubt it.
The moral duty that is upon Elders and all adults to protect and care for the young and for the vulnerable, is always it seems to me, put a long way below "not bringing reproach on Jehovah's name" by these terrible crimes becoming public knowledge.