when nothing is found in an other wise healthy non-smoking,non-drinking, exercise everyday 32 year old, what do you put down as to the cause? Natural? Under what circumstances would M.E. decide that not waking up was a NATURAL cause?

on the death certificates you have Natural
Homicide, Suicide, accidental, etc..... if none of these are found then it is a natural death, if one of the other things found the other would be checked off