Joseph
Too bad The Tzitz Eliezer had to spend several pages in several simanim not to mention many many others who adresss if/when autopsies are allowed, along with other Poskim including in cases similar to the op’s. Shouldev just asked you
Are Autopsies allowed to solve a murder?
Joseph: “Autopsies are kinegged halacha, so how could you even have a shaila”
(no to mentiont he fact that you are aslos wrong about THIS PARTICULAR case since the Tzitz Eleizer does seem to allow it.
At the very least though, it is a shaila.
Can we do this for everything?
Is the Kosher switch allowed?
Joseph : Turning on lights on Sahbbos is keneged halacha, whats the shaila
Can a pregnant woman undergo radiation if delaying it will risk her life but doing know will require abortion?
Joseph: Abortion is keneged halacha, whats the shaila