Brandon Jameson was stopped by security at the entrance to the "family friendly" Stewart Park event at the weekend where the blade was found in his tracksuit bottoms.
The 20-year-old was one was one of seven teenagers locked up in June 2016 for the mob killing of defenceless car valeter Mr Tunney , 24, in Norton.Not 'locked up' for long enough, clearly...
Jameson wasn't named at the time of Mr Tunney's death due to his age - but a legal order preventing his identification expired when he turned 18.
Since appearing at Teesside Magistrates' Court on Monday for this latest offence, Jameson can now be named.What prompted them to search him?
Justices heard that security initially suspected Jameson had alcohol in his possession at the Marton park event, so searched him about 8.45pm last Friday, prosecutor Emma Cruickshank said.
Security then spotted a "shining object" in his tracksuit pocket which was revealed to be a large blade.
Ms Cruickshank said his behaviour "deteriorated" when the knife was spotted and he became aggressive towards the event staff.I hope they adjusted his attitude for him. Prison clearly didn't.
The judge, Mr Justice Andrew Smith commended the police officers in the case for their work.
He says reporting restrictions will remain in the cases of the 17-year-old and 16-year-old defendants, meaning they still cannot be named under a court order.
He says the welfare of the two teenagers outweighs the public interest in naming the youngsters.What does he think now, I wonder?