I'm lost on this.
How does a foreign entity proving by means of handwriting ownership, DNA, photos, etc., amount to 'case closed'? I mean, wouldn't that be more like 'case open'?
Is that what happens, people raise their arms and say 'case closed' and go home? I believe this is wrong. What would REALLY happen?
Hard to say. If they are providing these items and also DNA and writing samples that would imply that they are already in custody or at least in contact with LE. So when you say an SFF who satisfies all the items on your list, how do you envision them providing them?
For me- they'd make a public announcement declaring responsibility (like Karr) except at that point they would be able to say they had the items. Saying it and really having it are not the same things, so at this point unless the SFF is actually in physical contact (and not merely phone or web) with LE, there would be no way to corroborate their claims. So following it to the next step- claiming responsibility, then providing PROOF by submitting DNA and handwriting samples that are shown to be a match as well as proving possession of the items on your list and turning them over to LE. At that point, they would be arrested, indicted and hopefully convicted, unless they pled guilty.
Is there some other way you see it happening?
As far as my "case closed" comment- that was figurative, not literal. Case closed in the minds of many.
Some people (as well as some media) thought that same thing when Karr was arrested. But that quickly dissipated when all there WAS were his claims. He knew NOTHING that was not information available to anyone. Media reports that he knew things about the case that only the killer could know obviously had to be false, or they would NOT have let him go. They'd have tried to find out if his knowledge came from being there, or from someone who HAD been there. And since we never heard another word about it, and he was released, that tells me that Karr had nothing to offer other than his sick fantasies.
With Karr there were the claims, but nothing else. So though he was taken into custody it stopped there, and he was released.