Madley's had a shocker here, regardless of what Firmino said. Failing to punish the dangerous push, putting himself in the middle of a mass con so he has no idea what's going on around him, failure to make any effort whatsoever to even try and control the crowding and failing to do anything about being grabbed by Holgate. Any one of those would get a below standard in a 7-6 assessement, all 4 in one incident is totally unacceptable from a top ref. He's just switched off there and let events happen to him - unfortunately, he needs to be given a serious break from top matches after that IMO.
And partly because of that, I can't see him making it worse for himself by confirming any racist language in the incident. If he reports that he heard something and failed to show red for it, on top of all the other mistakes he made, that could be the end of his top flight career. Which means it'll come down to a case of he said/she said, which, as long as Liverpool don't try the daft "cultural differences" defence they did with Suarez, should mean nothing comes of it.