not sure about utah but not every state has a good samaritan law. there are also nuances to these situations that are not apparent to everyone else. I dont walk around with all my EMS shit in my pocket, so there really is not tons you can do support wise for the patient. Also when you are off duty, you can't use certain equipment unless you are "on the clock" with your EMS company or whatever. Its weird though because good samaritan law or not you are held to the standard of whatever your license or title is. So thats why so many of us are gun shy. If we walk by and hold c-spine on this guy and get hep-c on our ungloved hands, theoretically a case could be made that we (as trained personnel) should have know body substance isolation and practiced accordingly... this country is a trip sometimes.
I think in the end, waiting for the ALS rig to show up and then of course the helicopter was the best decision - other than getting him out from under the burning car of course.