Audio Track
Listening to the audio track of the accident, but not knowing whether the bang at the end was the collision with the ground or the inflight breakup, I am reminded of the sound of WW-2 fighters doing a high g pullup. There is a dramatic doppler drop just before the bang.
I am guessing that the bang is the sound of the breakup, and the dramatic drop in doppler corresponds to a high g pullup but at the moment we do not know the geometric relationship of the microphone to the aircraft's flight path.
I would expect that ATC radars and audio will have significant information as to what transpired in this accident.
This is looking more like a loss of control accident as others have suggested.