I do too, but it's not looking likely, unfortunately.
The police would have already checked to see if their passports had been used between the hours of 8pm Monday and now?
That's another reason I don't believe he did it, I do realise how much debt he was in, and I know to me and you, that's a helluva lot of money, but he had properties in other Countries too that could be sold to make start in clearing the debt.
Out of everything he owned and everything he could have sold, it really isn't an awful lot of money in the big scheme of things.
Sorry it happened in your family, HK xx