It depends how he gained it. If it is outside of the confessional, it is his duty to report an apparent crime. If it is during a sacramental confession, it is even more his duty to keep it secret, although he should advise the guilty to surrender to police.
“although he should advise the guilty to surrender to police.”
And the results of that policy are now plain for all to see. It’s a failure most complete.
If priests are willing to go to prison as accessories after the fact I’m okay with that. Church policy does not outweigh criminal law. Toss them into cells next to the pedophile monsters they protected.
L