Sorry, when I read it, it seems to only mention "medical" assistance.
I obviously can be wrong.
I was thinking the same thing. "Good Samaritan" laws primarily protect individuals trying to render first aid after an accident. I am not sure there are civil protections for those who intervene in situations like the one being discussed especially when lethal force is involved. The Texas Penal Code does provide the ability to do so, but is it always the right decision to do so?
Also note it states "anyone who administers emergency care in good faith will not be liable for civil damages," but what about criminal negligence charges?
While bravado is easy after-the-fact and on the Internet, actually dealing with this at the time is a different matter. I am not defending the man pumping gas, but I am not second guessing his decisions either. There is a myriad of valid reasons why he chose not to get involved. Even if he had a weapon, there are huge ramifications and liabilities for drawing one on someone even under these circumstances. He is not a police officer, and has no duty or requirement to intervene. That does not prevent him from doing so, but given the accusations of excessive force peace officers are facing these days that can easily dissuade the ordinary citizen from doing so.
I am simply saying too many are Monday morning quarterbacking this incident based on the video, there are far many more factors involved. I will agree there is far too much public apathy towards the plight of others these days, but that does not necessarily require or justify an individual to get involved in such situations. It just isn't that cut and dried...