I haven't seen that report have you got a link for it ?
Nope because I don't keep them handy tbh but if you go to page 1 on this thread included in the report it states Holgate and the referee spoke again.
The daily mirror just continued to push the "puta" angle
If it was all a misunderstanding at half time, strange how Allardyce didn't confirm this and confirmed Walsh will be overseeing any kind of investigation and Klopp said they will co-operate with whatever they can.
If it "was put to bed" then I'm pretty sure at full time they would have all said this and Madley would not have spoken to Holgate again
Edit - Daily Mail 9th January
"Accompanied after the game by manager Sam Allardyce and director of football Steve Walsh, Holgate complained to Madley that Firmino had used the word 'negro'.