First responder here. The DNR doesn't mean a damn thing until it is literally in your hands. Until that time you respond as though there is no DNR. If you're wrong and they did have one but just didn't have it on hand then you accidentally save someones life, you're still legally in the clear, and I guess they can just die sometime later. But if the DNR turns out not to be real/legitimate and you didn't act just because you were told there was one then you just killed someone and you're completly fucked.
If you have a family member that has a DNR then be damn sure everyone knows where that thing is because unless you have it physically there when they are dieing then it doesn't mean anything.
Of course in places like nursing homes there is a different procedure. They know who has one on file and they will usually tell dispatch about it before the ambulance is even sent. But if it happens just in your home or someplace then the ambulance crew can't just take your word for it; they need the document in hand.
NTA, if he wanted to die he should've done it behind closed doors
In cancer world this is why patients are instructed to print in large letters “AMBULANCE” on an envelope pasted to their fridge. It informs anyone coming to their house to not resuscitate . So likewise it Should be on neighbour to inform everyone of his DNR before calling a lawyer or laying any blame. You have no ability to see his chart as a bystander. He should own that. Nothing was stopping him from going around and informing his neighbours to not try to resuscitate if he expected any less. And that is on him.
Leave a crate of vodka on his porch
Rule of acquisition 285: No good deed ever goes unpunished.
If living is such a big problem for you then why don't you just die?
Sure, Jan.
