I think that Tandemrotor & Shy Torque are being unkind about Walter Kennedy. You must remember Gentlemen that he is the ONE person who "knows" what happened.
His problem is quite simple. What he "knows" requires that there was a modification to the aircrafts navigation system that was not recorded in the F700 and the aircraft crashed whilst the Crew were trialling this equipment.
Leaving aside the fact that there is no evidence that this equipment was fitted to the aircraft; no authorisation would have been given to carry out such a trial on a passenger carrying sortie - particularly when some of the Pax were civilians.
What he seems unable to realise is, that for him to be correct, the Pilots would have to have been carrying out an unauthorised trial on an unofficial modification to the aircraft and crashed whilst doing so.
There could only be one finding if he is correct.
Incidentally, where did the story about US Navy SEALS come from?