[Byron_the_Aussie]

..Article: "DNA tests were conducted to see if the knife could be tied to the body, but no link was establised"...

Article: "A week later, Perry's tent at the battle group's base in Kandahar was searched and a knife, a pocket tool and other objects were seized."

A week.

[Aura Of The Blade]

There are weapons that are found weeks and months later that are offered in evidence in trial courts all the time. Your assumption must be dismissed as non-thinking. To attack a MCpl Perry personally who is not here to defend his honour is the lowest of the low.