I agree with everyone that posted about the Pitot!!
I think this crash is going to be something along the lines of Aeroperu 603
and Birgenair 301. The biggest culprit is darkness!
let say the pitot was blocked the aircraft on board computer would have picked up on the problem, when it noticed the difference in airspeed and altitude between the two sets of instruments!! that then triggered the ACARS message!!
both pilots would have gotten confused by the different readdings and flown the aircraft into the ocean!!! (CFIT)
Just my opinion (Sorry if thats what like everyone said, i didnt read the other posts)