Originally posted by MrBarnett
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I have little doubt that a sharp-pointed knife CAN penetrate the sternum if enough force is applied, and if the blade is tough and sturdy enough. It goes without saying, more or less.
However, I am equally certain that a frail and smallish blade will not penetrate the sternum.
So what I feel Killeen is saying is that the blade used for the 38 wounds was so small as to make him believe that it could not have penetrated the sternum. It was spoken of a pen-knife, and pen-knifes are typically not the strongest of knives.
At the end of the day, what is of importance here is not whether "an ordinary knife" (whatever that is ...?) can penetrate the sternum, but instead whether or not Killeen was able to establish that two blades were used when stabbing Tabram. And as I have said a few times by now, if the appearance of the wounds had been the same throughout, then Killeen would of course not have reasoned that the sternum stab was inflicted by another weapon. What he instead says is that no knife would have produced the kind of hole he saw in the sternum. That puts the matter to rest, the way I see things.
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