What is the ethical concept in this scenario?

This analysis should cover a(n);

1. description of your chosen ethical concept

2. explanation of how your ethical matter relates to an ethics concept

A homeless man was extremely ill when he went to the hospital but unfortunately, the doctor denied medical treatment because of his appearance and smell. Fortunately, the homeless man came across a nurse in the hallway who took it up on herself to give the man the care that he needed to the best of her ability. Once the doctor found out a day later that the homeless man was being treated, he tried to force him out of the hospital by calling the cops and the Chief medical officer.