Alex Smith, 16, was brutally hacked to death at the Regent’s Park housing estate in north London shortly after 11pm on Monday night.
He became the fifteenth teenager to be killed in London this year as the capital’s violent crime wave shows no sign of letting up.
Horrified witnesses told how the young lad was chased into the estate by a gang of thugs before desperately knocking on doors and screaming for help before his savage death.
A friend of Alex’s also said that the 16-year-old had “gone off the rails” and fell in with the wrong crowd after he was released from Southampton youth academy.
Alex’s callous attackers reportedly laughed and shouted just seconds after plunging the “foot-long” blade into his back.
Naqueeb Khan, 32, said: “I saw a boy knocking… He was screaming and shouting ‘help, help, help. Open the door, someone’s chasing me.’
“He couldn’t escape and he was stabbed in the back.”
Rosanara Begum, 55, told the London Evening Standard: “The boy was running away from them. Then we saw the two boys holding him and the other one stabbing him.
“The attackers were skinny and just looked like teenagers. They were running off and they were screaming and laughing”
“As soon as I heard ‘Help me, help me’ I was on the phone to the ambulance. He was bleeding a lot.
“The attackers were skinny and just looked like teenagers. They were running off and they were screaming and laughing.”
Pals today claimed Alex had played youth football for Southampton but had “gone off the rails” after he was released by the club.
One friend told the Sun: “We played in the same football team for a number of years.
“I was good friends from around age six to 14, but in the last couple of years, he went off the rails.
“We played at Southampton FC youth team together but he got released and then got involved with the wrong people.”
Shocking figures released earlier this year revealed that Britain’s murder rate is at its highest level in a decade. Alex’s killing is the 86th homicide in London this year.