Do Murderers Need to Turn Themselves In?

What happens when someone confesses a murder?
Catholic Answers Live Clips | 16 Aug. 2025
https://www.youtube.com/watch?v=XMfnisVtnSM

4:50 In such a case, two things.

1) The priest could ask the murderer to turn himself in if someone else is credibly accused.
2) The penitent could at least earlier times have both taken the blame and not turned himself in, nowadays there is Interpol, so that's less of an option. Still could apply in some cases.

So my original 2, now third thing:

3) If the justice system is likely to frame innocent people just because someone has to take the blame, the murder case has to appear solved, perhaps neither priest nor penitent owe that justice system all that much respect, and what other innocent man gets framed that's on the corrupt justice system, not on the murderer. Now, in my one, I would make an exception to this if someone else is credibly accused. If the absence of confession to police by the murderer means someone else has to hear (reasonably) "OK, you say you are innocent, but the evidence looks very damning." But only if this is reasonably. Not if it's because of too loose a relation with the concept of "evidence beyond reasonable doubt" ...