Trump yet again lies by making up rambling story about imaginary people causing an airliner crash before the dead bodies have gone cold
Airplane crashes a lot of times are very complicated with a lot of important factors leading up to the crash. This, combined with usually complete carnage and destruction, makes it that typical investigations take weeks, months, sometimes years.
Even if trump had been able to form a coherent message about the cause of this crash it would have been bullshit because never in the history of aviation did we know for certain what the cause of a crash was within 16 hours of a crash. It's. That. Simple.
Then again, this is trump, and no investigation will be made because this will become the official reason, the end