Thanks Tom you are absolutely correct.I wouldn't even ask, it's way to early. Let the dust settle and the family grieve.
If the family desires they will offer whatever information they want public. Fatality vehicle accidents even single vehicle ones (which it may or may not be), aren't the same as fender benders or even serious injury accidents. It could be a while before any investigation is completed, and there is almost always litigation of some sort.
Tom