Like parabellum I too was in Singapore at the time working for the parent company and as he says it was a deliberate act of suicide and murder by the deeply flawed Captain whose career and personal life were in ruins.
Loss of Face is very important to certain peoples and he was clever enough to know that having pulled both CB's behind his seat that it would be nigh impossible to 100% say it was deliberate despite the full power and stab trim wound fully down.