A murderer 'laughed' as he plunged a samurai sword into a rival's back before hugging and shaking hands with friends.
Javell Morgan, 20, died after he was stabbed when two rival gangs from West Yorkshire clashed at Manchester's Caribbean Carnival.
The groups, from Huddersfield, confronted each other at a street party after the festival on Claremont Road in Moss Side, in August 2022, where a gun was fired igniting the feud.
Jacob Doughty, 21, was part of a "pack" who "chased their adversaries", catching Javell and stabbing him.
Manchester Crown Court heard how a witness saw Doughty 'laughing' when he killed Javell, and was seen hugging and shaking hands after.
Following a seven week trial, he was found guilty of murder.
Deontay Crosfield, 22, who became 'entangled' with Javell before he was killed, was also convicted of murder.
Three other young men, Byron Goodhall, 23, Simeon Baptiste, 24, and Darius Blackburn, 21, also stood trial and were found not guilty of murder and manslaughter.
Another three men then went on trial accused of attempting to murder Mr Baptiste in the same incident.
Following a separate trial, Mikyle Bucknor, 19 and Karmarni Batler, 20, who were both armed with guns, were convicted of attempted murder. Harlan Richards, 19, was found not guilty of attempted murder.
At the murder trial, prosecutor John Elvidge KC told how the killing unfolded at a street party held on Claremont Road in Moss Side, after the main carnival had finished on August 15 last year.
The killers had travelled across the Pennines for the carnival. He told jurors: "On Sunday, 14 August, a mass of revellers gathered outside the Claremont pub and J’s Takeaway shop.
"A DJ booth was set up and the street was packed with people of all ages enjoying themselves, listening and dancing to music, eating and drinking and soaking up the atmosphere.
"Amongst that crowd were two groups of young men. Each group had travelled from Huddersfield.
"These defendants were part of one group. Javell Morgan, aged 20, was part of the other group. Both chose to attend, armed with lethal weapons, namely guns and knives.
"These were the lethal weapons they carried to use. It was shortly after midnight on August 15 when these opposing teams got into conflict on Claremont Road.
"The Crown says this was gang violence. It was all over in minutes.
"It involved one side attacking the other, armed with guns and the other side counter attacking with knives. The prosecution say, like a pack they chased their adversaries down Claremont Road.
"Javell Morgan was the only member of his team caught. The killing of him was an immediate act of retribution."
The court heard that the two groups were at the after party on Claremont Road by 10.30pm on 14 August, and by about midnight they were outside J's Takeaway.
Mr Elvidge said: "A by-stander heard one of the members of the opposing team say to another 'there’s ops right there, I see ops right there'."
In the following few minutes, the two rival groups clashed and Javell, from Leeds, whose family live between Halifax and Huddersfield, was murdered.
Bucknor pointed a loaded handgun at Mr Baptiste. When he moved forward, Mr Blackburn struck out at his arm and the gun was fired into the ground.
"The tables turned in an instant," Mr Elvidge said. The group were chased down by Doughty and Crosfield, until Doughty cornered Javell and attacked him with the blade, which a witness described as looking like a 'samurai sword'.
He was able to run a short distance before collapsing near some police officers. "Javell Morgan was left with a fatal injury to his back, several stab wounds to his left and right thigh," the prosecutor said.
Following the attack, Doughty was seen to throw the sword into a backyard behind the pub. He then walked back to the road, exchanged hugs with one person and shook the hands of another, Mr Elvidge said.
Police recovered the weapon the following day. Doughty was later arrested in Huddersfield. Crosfield tried to flee from officers when they went to arrest him.
Doughty told the jury that he was acting in self defence when he stabbed Javell. "I just swung the knife," he said. "The blade was sticking up. I think it hit him in the upper body.
"I don’t think it had any effect. I don’t know if he was injured. I was in the moment, it was a very mad situation at the time. I believed he was trying to attack me."
Details of the case can be reported for the first time, after reporting restrictions were lifted at the conclusion of the second of two crown court trials.
Doughty, of Ponyfield Close, Huddersfield, and Crosfield, of Rawthorpe Crescent, Huddersfield, both face life sentences and will be sentenced later in May.
Mr Baptiste, of Wellfield Bank, Huddersfield; Mr Goodhall, of Dalmeny Avenue, Huddersfield; and Mr Blackburn, of Towngate, Huddersfield; were discharged from the dock after being acquitted.
Bucknor, of Farrar Drive, Huddersfield, Batler, of Belle Vue Crescent, Huddersfield and Richards, of Trafalgar Close, Huddersfield, were convicted of three offences of possession of a firearm with intent to endanger life, and both Bucknor and Batler were convicted of attempted murder. Richards was found not guilty of attempted murder.
They will be sentenced on 31 July after trial judge Patrick Field KC asked for pre-sentence reports to be prepared by the probation service.