I work in 911 dispatch, at my agency our calls are assigned a priority from 1-5, 1 being the most severe, 5 the least

1 and 2 are considered high priority, you're getting all the lights and sirens and everything, 3-5 are low, on the police end of thing a priority 5 is pretty much just us giving information to them, not something they actually need to do anything about, maybe they need to drive by and check on something, and maybe make a call afterwards to to public works or something to have them deal with an exceptionally bad pothole.

On the EMS side of things what that looks like is

1- pretty much what you expect, cardiac arrest, shootings, choking, traumatic amputations, etc.

2- honestly most of the EMS calls we get are a class 2. Things people need to go to the hospital with some urgency, but aren't in immediate danger of expiring on the way there.

3- these are sort of the "you really called 911 about this?" calls. Like, sure, you should probably get this checked out, but you probably could have driven yourself or gotten a friend to take you to an urgent care, it probably could have waited a few hours, and the doctors probably just gonna tell you to take some Tylenol and take it easy for a few days.

4- this is basically psych patients. Physically there's nothing wrong with them, they're just mentally unwell

Which brings us to the point of this rant: class 5- obviously dead people. They can't get any deader, so no real rush. They basically just need someone with some medical training to go out there and go "yep, that's a corpse" and maybe check up on the family member who's having a panic attack over it. Doesn't get much more stable than that.

As a result of this "Class 5" has also entered our jargon as shorthanded for a dead person. So much so that some of our local news stations have picked up on it, if it's a slow news day and they're listening to the scanner fishing for a story and they hear "class 5" they might get a little nosey about it (I have a friend who worked for one who told me that after I started working here)