The path of a JC committee for apostasy is predictable actually. It always inevitably reaches a fork on the road within minutes of starting, where it can go in two directions.
The first path is if you play the humble sheep, and say that you " had temporary questions because you read some apostate literature, but have prayed and now realize again that the Watchtower is God's organization". They will then "slap" you around a bit and warn you to keep away from the "devils table". In this situation, the JC will be short and you will get a small slap on the wrist and be on your way.
Second path is when you start asking hard questions and you bring materials exposing the WT as a scam. Once they realize that you are there in "confrontational mode", the entire focus of the panel is simply to gather enough evidence to support disfellowshipping. So a barrage of questions will come your way always around the subject of the legitimacy of the faithfull and discreet slave. They will not stop questioning you on it, untill they are satisfied that you have admitted that you don't believe the GB is the FDS at which point they will dismiss you.