It would probably depend on the severity of the accident more than likely. They would definitely call in another incident to dispatch and get an additional response unit. More than likely they would continue with patient care of the initial patient, while making a primary assessment of any new patients until the next responders arrived on scene. At that point they would continue to the hospital with their initial patient. In response to your friend's statement, the emergency responders are always held liable in an MVC regardless of whose fault it was. This is because they're held to a higher standard. They will never deny patient care regardless of the situation though.