During the 1-1 draw between Liverpool and Crystal Palace (2022-08-15), Liverpool's Darwin Núñez was sent off for a headbutt on Crystal Palace defender Joachim Andersen.
It is my understanding that a straight red card for serious foul play / violent conduct is an automatic 3-game ban, however there have been numerous reports in the media in the aftermath of the incident that Núñez could be banned for more than the standard three games. As an example of this happening before, Luis Suarez was infamously handed a 10-game ban for biting Branislav Ivanovic in 2013.
What is the procedure for determining an extension to the 3-game ban?
For example, in Rugby Union, if a player is sent off they are required to attend a Disciplinary Committee hearing, in which the referee's report of the incident, the player's reflection on the offending action, the player's past discipline record, plus other factors, are all taken into account to determine how long the suspension is.
Note: For scope, and as I believe this will likely differ between football associations - I will be looking for procedures from the English FA, as that is who Núñez's suspension resides with. Although if there is a standardised FIFA/UEFA procedure that is followed by the FA, then that is fine, too.