Conor Black was stabbed in the back last August
An illiterate 16-year-old who boasted after stabbing a boy outside a house party in Manchester has been found guilty of murder.
Conor Black collapsed and died minutes after he was stabbed in the back in the attack outside the party in Garnant Close, Moston, last August.
Greater Manchester Police said he was attacked in a row over an Xbox game.
The defendant, who cannot be named, admitted manslaughter but his plea was rejected at Manchester Crown Court.
The court heard Conor lived with his mother in Moston, north Manchester, and was staying at a relative's house on the night he died.
Prosecutor Charles Chruszcz QC told the jury he left to go to a house party but then he and his friends were asked to wait outside the house.
The defendant boasted that he was "the man" after the attack
Conor's attacker came out of the house and smashed him over the head with a full lager can, before stabbing him in the back as he turned to escape, the jury heard.
Mr Chruszcz said Conor ran a short distance to a grassy area where he collapsed and died.
He suffered a single stab wound which severed the main artery in his body and led to extensive internal bleeding.
The court heard the defendant then stood in the road shouting that "he was the best, he was the man".
The prosecutor said: "Conor Black died as a result of an unprovoked and brutal assault.
"He was struck violently over the head with a full can of beer then he was stabbed in the back, he never stood a chance."
Threats to witnesses
A police spokesman said: "The 16-year-old boy wanted to confront Conor over the alleged theft of an Xbox game, and fatally stabbed him in the early hours of Saturday August 16 2008."
He said the defendant threatened "to kill" anyone who mentioned his name to the police.
The jury heard the teenage killer was unable to read or write properly and had been unable to tell the time or tie his own shoelaces when he was 10.
He will be sentenced alongside another man, John Boyd, at Manchester Crown Court on 20 February.
Boyd, 21, of Nowell Road, Middleton, Manchester, pleaded guilty to section 47 assault and perverting the course of justice.
A 17-year-old boy, a cousin of the defendant, was cleared of perverting the course of justice.
He had denied the charge.