In reply to Boocat:
> But looking at the really basic simple cause of the kid's tragic death By the rope falsly being attached to the biner by a rubber clip.
Hi Boocat, welcome to UKC. Not being pedantic here but I just want to correct your wording a little.
The quick draw sling wasn't attached to the crab at all. It looked like it had been but is wasn't, the rubber retainer at the rope end of the QD held the sling and the crab together and at first glance, it appeared to be 'normal', in fact the only thing that held the sling and the crab together was the rubber retainer. When weight was loaded on the system, the rubber retainer failed allowing the sling and the crab to part. The sling was never actually clipped to the crab as it should have been, if it had been the system wouldn't have failed. This can happen in 2 documented ways - user error when making the QD's in the first place, I understand this was the case in this incident as other QDs were found after the incident that had been set up the same, fatal way. The other being accidental clipping, that is a long QD that has a retained rope end crab and one stand of the sling has managed to clip itself to that crab by accident. Really what has happened here is the sling has 'unclipped' itself from the crab but the retainer holds the sling onto the crab and should the climber not notice this, the only thing keeping him off the ground is the rubber retainer.
Its really important to understand these things as your life depends on that understanding.