Janie,
What was the question? Is the question "How did he commit suicide?" But isn't the answer there when you said "he was found hanged from the ceiling".
Actually I was blur lah... I was thinking that originally the house could be flooded and while he was struggling to keep himself above water, he threw his tie to the ceiling and tried to grab the tie. Somehow, he "ga lang ga boh" and ended up hanging himself from the ceiling lor. And by the time the investigators came, the water would have dried up/seeped out of the house, that is why got water marks loh..keke...Very imaginative hor?