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.