@Finbarr
The point I was making is that circumstances (and people) out of our control will blur that well-defined line so many posters have drawn around themselves with the 'nothing to hide' pen. How many people will (albeit wrongly) 'fess up to driving a relative or friend's car because the person that they care about has too many points on their licence. How many people have backed up a friend or family member who is carrying on an affair, continuing a lie to cover for that person, sometimes for years.
These are minor infractions (of the heart, marriage vows and road regulations) but to suggest that one turn in one's own mother (and believe me, if she were to be discovered clutching a bloodied dagger above the fresh corpse, I'd still proclaim her innocence) is a tactic worthy of Stalinist Russia. Yes, to reiterate, I'd frame Buddha, Mother Theresa and every orphan worldwide to enable my mum - the one who carried me for nine months and then put up with me for thirty-eight more years - to wriggle out of even a justified incarceration. Wouldn't you? It's your mum, for God's sake! (I can do ad-hominem variants too)
But no, I would not revel in violent or sexual offenders escaping justice in the vacuum created by a lack of any system, nor do I lament the apprehension and punishment of those who have been caught through familial DNA. That would just be churlish.
Are there any Icelanders here who could shed light on just how it works when everyone is on a DNA register. I understand they all complied en masse to a database a few years back for genetic tracing of ancestors. Is crime any lower in Iceland than it was before their database went live? That would be the acid test - a comment from an Icelander. Are you perchance Icelandic? They love their mums.