The youngster, who cannot be named for legal reasons, has been giving evidence at Leeds Crown Court on day six of his trial. He admits killing Alfie on the afternoon of November 7 last year, near to the junction of Church Lane and Church Road in Horsforth, but says he was in fear for his own safety.
He added: “I did not think I had any other choice but to pull out the knife. Everything happened so quickly. I was just trying to protect my own life.” Having been arrested around half an hour later, he said he was told by a duty solicitor to make no comments during his police interview, but admitted he was both shocked and scared. The boy said he had first met Alfie in a KFC when he was about 10 or 11 and there had been “no problem” between them.