Family and friends of murdered Real IRA boss Alan Ryan heckled a second suspect as he was charged in relation to the killing.
Security was tight in Dublin District Court as Robbie Carroll appeared on a charge of withholding information in connection with Ryan's death.
Six gardai surrounded the 27-year-old as he sat behind a glass screen next to Ryan's family and associates.
They shouted "scumbag" before being escorted from the court where they confronted Carroll's friends.
Judge William Early called three of the men - including Ryan's brother Dermot - back into court where he warned they would be jailed for contempt of court if they repeated the outburst.
Ryan was shot dead on September 3 while walking with an associate on Grange Lodge Avenue, Clongriffin, north Dublin.
The 32-year-old's Real IRA faction was involved in extortion and intimidation of drug dealers and racketeering against pub and club owners.
The case was adjourned to Cloverhill Courthouse next Wednesday when Carroll will reappear with Dublin man Thomas Hunt who was charged with the same offence in a closed hearing.
Garda Alan Roche told the court Carroll, of Ard Cluain, Clonee, Co Meath, made no reply when charged at Coolock Garda Station.
The garda said there was strong evidence against the accused, including a large amount of CCTV, telephone and computer analysis and fingerprints.