This sounds like such a freak thing.  It must be so hard for the family because there are no answers and they need answers.  I'm not sure this is something that is easy to figure out.  It sounds like a severe case of pneumonia, but from what, how and why.  And the fluid on the brain of the one sister is so strange.  I would think they would know more after the autopsies, and I don't understand why that is taking so long.  I'm thinking that the family wants to bring the bodies back to the States and that could be holding up the autopsies.