No. When they cause a medical condition and they are made aware of that fact, it is their job to render aid. By failing to render appropriate aid, they were perpetuating the injury. They knowingly injured him.
This is gibberish.
How could they knowingly have injured him when he claims that he was already injured by the time she opened her mouth, and since her utterance revealed she did not know he was actually injured but was under the mistaken impression that he was not?