Lets ask two questions:
1) did the patient say he wanted nothing to do with EMS, and slammed the door in their face?
1a) do you expect the EMS crew to force their way in, and force the patient to have his vitals checked?
2) was the crew being lazy, and not doing their job, and made the assumption that it was not cardiac related based on the patient's age?
liability is a funny thing... to be found liable, you need to meet the 4 components of negligence, which can be described by the following source
https://www.law.cornell.edu/wex/negligence
Four elements are required to establish a
prima facie case of negligence:
- the existence of a legal duty that the defendant owed to the plaintiff
- defendant's breach of that duty
- plaintiff's sufferance of an injury
- proof that defendant's breach caused the injury (typically defined through proximate cause)
If those 4 requirements were met, a claim of liability due to negligence could be made.
So, based on how you describe the call, I think it would be a stretch to say the crew could be liable, esp since the bf didn't want the ambulance, signed a refusal, and didn't suffer a cardiac episode (at least you didn't mention it).
But liability is one of those words that EMS bosses like to throw around to scare newbie providers, despite successful EMS lawsuits being very few and far between.