Let me give you an example: it's a personal one, but it makes the point. In 2004, my father passed away of sudden death. I was going to say sudden cardiac death, but truly I cannot say even that, because my mother, as his first and most immediate kin, and a competent person, refused an autopsy. (Side note: Apparently in Vermont, there is no requirement to do post mortem examination of outside of hospital, unattended or unexpected deaths. I must admit this surprised me. I believe it would have been required here in Missouri.) Now, I wanted to know, but my mother says she did not want it, and besides "dead is dead." I cannot assert any right to make that decision and obtain knowledge over my mother's wishes not to know. I do not have that right. I didn't have it then, and I don't have it now.
So anyone thinking that I judge those who want more information about the death of a public figure or about the details of an event that is not judged a crime, I do not judge. I understand your frustration. Your frustration however, does not entitle you to the information you desire.