Referee bosses are ready to share their audio with the FA as action is taken against Liverpool manager Jurgen Klopp following events during and after victory over Tottenham.
Klopp celebrated their injury-time winner in the face of fourth official John Brooks, which he was booked for by ref Paul Tierney, who Klopp later accused of saying something untoward to him.
Both Tierney and referees body PGMOL deny Klopp's claims and with all Premier League refs carrying microphones, they can provide audio evidence in support.
PGMOL will be sending their audio to the FA, which were deliberating on Monday over what action to take against Klopp.
The Daily Mail says an insider has described the audio as a "smoking gun" and that it will be made public once the hearing has concluded.
Klopp has already served a one-game ban this season for berating assistant referee Gary Beswick during Liverpool's 1-0 win over Manchester City in October, as well as being fined £30,000.