As you all rush to unfounded conclusions, please keep in mind that in the case of the Silk Air accident it was never conclusively proved that the captain deliberately caused the aircraft to crash in a suicidal act. That conclusion was and remains an assumption on the part of some of the investigators, not all.
On the other hand it was proved, in a court of law, that the aircraft's rudder PCU (which had previously caused two fatal accident it the same aircraft type, pluse several incidents) was manufactured with defects that could have caused the accident and it was also shown, in the same court, that the aircraft's FDR had been replaced, prior to the accident, by an older and inferior model that had frequent occurences of gaps in the recordings and not recording the data at all.
The bottom line is we do not really know what caused the Silk Air accident. Suspicion and conjecture, no matter how educated, is not sufficient reason to forever blacken a man's good name.