I'm reasonably certain that if the civil authorities had ordered incarceration the guilty party would in fact be... incarcerated. I know you're not suggesting that the Catholic Church should take the law into its own hands and take over the courts... I mean... well no, that would be a bad idea probably... maybe. I mean I'm all for jailing unrepentant heretics but no...
As it happens I'd support making the Church pay the costs incurred in confining a priest convicted of a crime like the sort that are the subject of this thread (huh... I'll go all over the place to avoid writing it out)
Did you read the article? It would answer your questions.