I am not saying FlightAware is 100 percent correct. In fact in some cases it is totally wrong, however, based on what I see here, it kind of leads me to believe that he went from a normal climb speed of around 150 knots, ......to a much lower speed. What does that suggest ? If your ground speed drops nearly 100 knots, your airspeed probably did too. Please note, I said probably, not definitely. We know too, that there were several rapid changes of direction. Do you really think that was done intentionally? Lastly, at some point his airspeed increases dramatically. After a rapid loss of speed, and then an inexplicable series of turns, followed by a rapid increase in speed, you don't need flightaware to tell you he fell out of the sky, what other conclusion can you come to besides stall, spin/spiral, overspeed, structural failure, in flight breakup, crash, no survivors? The really sad part is, 6 people on board from the same family, and such a beautiful family too.