At a bail application a court heard Mr Dieni told police he had authority to “hold the boys back, but I also control them’’.
“I’m going to unleash them and tell them to smash every copper dog ...’’ the court heard.
Mr Dieni’s lawyer, Alan Swanwick, told the hearing his client had no convictions and was singled out because he was a member of a motorcycle club.
He was later found guilty of six of 19 charges he faced in relation to the altercation, but no conviction was recorded.
A magistrate fined him $3000.
Mr Dieni’s expulsion from the Mongols is not the first time he has fallen foul of his “brotherhood’’.
The former bikie “enforcer’’ was a member of Bros MC but fell out badly with them, defecting to the Finks.
There are unconfirmed reports that a close associate of Mr Dieni’s, jailed bikie Richard Michail, has been moved to protective custody inside one of Victoria’s prisons.