police were extinguishing the guy

Obviously, the guy did not want to live.

Human life is to be protected, rescued etc. in all cases.

We need to stay absolutely clear with that, because everything else creates terrible moral problems, for you and all the people around.

And if you want to start thinking such thoughts right there in a situation, it costs way too much valuable time.

Exceptions need to have very clear and very strict rules and the responsible persons (doctors for example) need to be educated properly.

Human life is to be protected, rescued etc. in all cases.

Where does a DNR and medical assistance in dying fit in this?

Yes, but you also said it should be protected in “all cases” but went on about “exceptions”. Assistance in dying doesn’t fit this criteria that would make it acceptable as most definitely not everyone agrees with it. Some DNRs don’t either. The idea that the “whole society” needs to agree is also pretty disputable, and comes with its own set of moral issues.

I just think it’s a lot more complex than “save everyone always”, and the exceptions aren’t that straightforward.