I don't know...
The assault "weapon" seems pretty important in a case that you're claiming you were assaulted with that you magically turn up months later.
It is innocent until proven guilty. A "Crime Scene" cannot be readily tampered with before you really can't use it. Since it boils down to "he said he said" bullshit, they can't really do much with the case. Since the cops supposedly already turned the car over looking for the pen-knife (is that what is it?), it seems quite fishy that he can magically turn up the object months later when the court stuff is about to get real.
HOWEVER! What if the knife was taken and then planted? What if the police that searched the car got paid off by Mr. Big Pants? Those are conspiracies that cannot be proven or disproven very easily.
Wish we had a real god present. We could just ask, "Hello, what is the truth?"
Bam. Perfect justice is meted.