But as you pointed out Guede has made many statements that have been proven to be untrue, and probably delivered under prosecutorial duress, including his statement that he sexually assaulted Kerchner when forensics said that there was no sexual assault.
He's not a reliable witness --
Do you have another source???
Guede is obviously involved and I believe the evidence indicates that he didn't act alone.
That being said, I don't know whether Knox was involved.
I do know that the strongest Knox advocates ignore the fact that there was some forensic and circumstantial evidence against her. It was fair to find her not guilty in the face of the evidence. It's not fair to blindly suggest it didn't exist.