however, if it's Jay on his own (or some one else other than Adnan), then how could Adnan ever say "it was Jay", he can't point the finger at him, he has no proof. All he has is the fact that Jay knew where the car was...and he has no explanation for that, but Jay does...so either Jay did it without Adnan and pinned it on him OR

Adnan and Jay did it. And like someone said above, Adnan can't contest it or say what really happened without implicating himself. And he wont do that now because he's claimed innocence so long...but if Adnan was involved, he killed her. And Jay helped but moreso than he's saying.

I actually want to believe Adnan didn't do it but when you think about it, there's really only two ways this went and if Jay had of said he knew nothing he doesn't know what that girl was talking about, denied everything chances are Adnan wouldn't have gone to jail.