Apparently they need someone to come forward and make a complaint, so it's unlikely that the first guy is going to come forward. He could, in theory, say that he only just met the second guy and he doesn't even know his name, as that would allow him to make a complaint against the ladyboy for assault. Unfortunately, it's unlikely that the police would believe him, and they might try to pin the punch to the ladyboy on him.
You would have thought that the police would tell the ladyboy, "Make a complaint if you want, but you did harass and assault the other guy first". Perhaps because they don't actually care about that and don't feel that the ladyboy needs to be "legally punished".