The closing of this case rests with the individual (Henry) who had the gun linked to the murder. I mean it's that simple. With him being deceased, it's probably cold forever. I forget... did they find any hair or fibers on the victims? I think this case could have been solved. I think they had the killer and couldn't finish it. Not sure you would have ever discovered who the couple was without pinning down the killer first. This case haunts me.
Should this case ever be solved I think the following two key points are going to do it:
a) Jock Doe's dental work:
The absence of Jock's 3rd molars is in itself an invaluable piece of evidence concerning his identity in my opinion. Even with the slight handicap of not knowing whether the "wisdom" teeth were impacted or partially erupted, it can be inferred that he at least had some financial means (given this and his other extensive dental work).
Information is readily available on the internet (
Wisdom tooth - Wikipedia, the free encyclopedia) which suggests that in Latin American countries (a widely postulated place of origin for the UIDs) removal of impacted wisdom teeth (in certain cases) is not widespread.
Coupled with the few available details of Jock's dental reconstruction (most notably the highly specialized root canal procedure) this would suggest that at the very least Jock's dental work was not performed in Latin America, and I think, that he probably was not from there.
The root canal work was ostensibly the work of a very skilled dentist, who more than probably specialized in the area, given that even by today's standards this was an intricate procedure. The cursory material analysis in this article (
http://news.google.com/newspapers?n...IwxAAAAIBAJ&sjid=UqoFAAAAIBAJ&pg=1367,7773272)) confirms the recent nature of Jock's dental work.
Sadly the dentist who performed this work is unlikely to still be practicing and even more unlikely to still have the requisite records needed for a PID. Notwithstanding I think it's the most likely avenue of identification for this young man (and by extension, the girl).
b) The gun:
I could not believe that such an important piece of evidence had seemingly yielded so little. The LE must have been sure they had their man but not enough evidence to convict. An examination of the POI's history may yet yield some evidence, albeit circumstantial, as to his guilt. Who knows maybe he held on to their belongings or papers as souvenirs? Although a very long shot maybe a search of the late POI's property could have yielded/yet yield something.
I realise how drastic and ridiculously hyperopic this sounds, but it frustrates me so much that 30 odd years on we're no closer to knowing who they are!