Indeed, as already covered this trial pivots on the opinion of the SI that the camera could only have been moved by a conscious act. As I understand it the SI has no proof of this beyond testing a theory in a simulator and not under the dynamic circumstances experienced during the flight. As to whether this theory, limited in testing as it was, is good enough to prove beyond reasonable doubt that this was a conscious act is beyond me.
Personally I have always struggled with the idea that in such challenging circumstances that any of us would have the presence of mind and clarity of thought not to mention the cause of the control restriction to the other crew member if/when discovered. I don't think I would have the capacity to think about a cover-up at that point and slip so gracefully into acting mode.
Still, we shall see what the jury thinks once presented with all the opinions out there.