The original news article has since been archived, but there was a horrifying case in 2007 where EMS in my hometown arrived at an accident for which they were unprepared because dispatch had mislabeled it as low-speed crash. There were 4 occupants in the vehicle, and, according to the fired EMT’s family, the front passenger was so badly injured that pieces of her brain were on the dashboard and she was unresponsive. The ill-equipped team worked to get the other three occupants out of the car and get them to the hospital and ended up assumed that someone on the crew had taken the presumed-dead passenger’s pulse.
As a result, a tarp was thrown over her body and she was taken away to the morgue where the coroner eventually discovered that she’d died due to her injuries rather than upon impact. All four of the emergency responders faced disciplinary action and I believe the family of the deceased won a lawsuit against the city.
The bottom line, and to your point, there are very strict guidelines and a lot of red tape before you get to say someone is “close enough to dead” to start carving out their organs.