The constitutional issues are freedom of religion, the right against self incrimination, the Miranda issues, etc etc etc
Where does the constitution say that the clergy have the right to impede criminal investigations? The right to self incrimination has nothing to do with this, since if they go to the authorities, they wouldn't be incriminating themselves, what does this have to do with miranda rights?
The clergy penitent privelege has some pretty ancient roots. Not a few priests died because they refused to reveal the confession of the political opponent of one monarch or another. IF what is proposed is approved one possible outcome is that pedophiles AND other sinners as well won't go to confession. Then they lose the counsel given, which is to turn themselves in in many cases.6 Million Europeans died, because of the catholic churches policy of killing those that had a different faith, should we allow drug use, since that was part of many ancient faiths? They should seek a pchycologist, not a priest. Obviously turning themselves in hasn't been the norm lately, or you wouldn't see the catholic church, and JW's under fire.