(Sorry for inconvenience in typing Chinese).
Thanks to 老貓和其他朋友 for advice and suggestions above.
"你說的特含含糊糊.." -- Actually, I don't know much more about the case.
The only thing I can do is to forward your advice and suggestions to her, my friend's wife in Canada. She has to make decision finally, as 老貓 said that I have no reason to be involved deeply.
Yet, "官方的死亡證明上的死因" -- Who is the 官方 to make decision on the reason of death? A local police office? If
Thanks again.