The chances of me attending to someone i was forced to shoot to protect my hide, in my scenario, is zero. My surroundings are still hostile and potentially even more dangerous now.
Being distracted trying to provide limited medical attention to someone would leave me vulnerable to further attacks -begging the question why did you feel threatened enough in the first place, if you could put your pistol away?
The opportunity to provide sidewalk med assistance would only be reasonable in a situation where you believe a single attacker is down, no further threats are around.
YMMV on the Good Samaritan route.
😎
The notion that you should provide aid to somebody you just shot is (in general) a very poor one.