Agreed, and frankly, as horrible as it would be, if I were a family member of a person who died under those conditions, I would expect every little thing to be checked out, and it is only right that every little thing should be checked out. As a family member I would *want* to know for *sure* what happened, even if it was one of my own family members who may have caused the death.
This isn't exactly a case where the situation even seems obvious, starting with the weapon itself. I am appalled to consider how many murders may go undetected. Family members can gently and humanely be told it's just protocol that things must be checked out fully, since, after all, surely they want the truth. Sometimes it goes the other way, where family do NOT believe it's suicide. Perhaps there are families where one or more family members may suspect something, but yet not want to throw another family member under the bus to be investigated, and so they keep quiet. To investigate fully works both ways. To me, the only person it would hurt to check things out properly, would be someone who was guilty of something sinister.. anyone else just has to live with the results - it's not often that we get to choose how our loved ones die, and even when they die in a hospital, things are checked out. moo.