BR: That is totally amazing to me. I wonder what law you are basing that on and what legal system/country you are referring to. If it is the USA - then this case is really precedent setting in that it is now legal for anyone to put a gun to someones head - pull the trigger and it not be called murder.
California Penal Code section 187(a): "Murder is the unlawful killing of a human being, or a fetus, with malice aforethought." For a death to be murder inter alia, there must be (i) a killing of (ii) a human being, which is (iii) unlawful and committed with (iv) malice and (v) forethought.
So, please don't be shocked, that has been the law for a long, long time.