Well, speaking as someone who’s called 911 a lot of times, (car accidents,) I wouldn’t say that someone was dead unless I saw a severed head, or found skeletal remains. I’d want to get medical help, to either help or ascertain that the person was dead. (Sometimes even trained emergency personnel get it wrong, so a layman shouldn’t presume to say that someone is dead.)
So, ‘unconscious, lots of blood’ seems right to me. And I don’t know how the 911 person sends things out. Are there codes for various situations?