In my mind I can visualise the aircraft on approach, going-around, *something* happens
Could that *something* have been a sudden, catastrophic, incapacitation ? (ie massive stroke, heart attack, or something similar).
The loss of control appears to have been total ; and so far I haven't read anything about any Mayday call.
All we know is that the unfortunate pilot was pronounced dead at the scene ; but death (or at least unconsciousness) could actually have happened several minutes earlier.
Information may be available from autopsy. Luckily there was no fire, which often cremates evidence when it does occur.