Kevin Richards, from Neasden, is accused of murdering Danny O’Shea in Canning Town

The stepfather of a teenager who was stabbed to death in a botched revenge attack desperately tried to save his life, the Old Bailey heard.

Danny O’Shea, 18, collapsed after being knifed in the neck by a band of thugs in Canning Town, east London, it is claimed.

The Old Bailey heard claims the teenager was targeted in revenge for the robbery of Paul Boadi’s Blackberry a week earlier.

Kevin Richards, 32, of North Circular Road, Neasden, is jointly accused his murder of alongside Boadi and eight other men.

Mr Brewer gave CPR with the help of family friend David Smith until paramedics and police arrived to take over.

Boadi, 35, and business partner Chris Nathaniel, 40, are said to have organised a tit-for-tat assault that resulted in the attack on December 2, 2011.

Mr O’Shea was heard shouting ‘Help, help’ before running to the door of family friends Lynn and David Smith not far from his mother’s home.

Lynn Smith said in a statement which was read to the jury: “When I opened the door I was shocked by what I saw. I saw Danny slumped over, leaning on my front door.”

Her partner David then went out to help and Mr O’Shea’s mum and stepdad arrived and the two men performed CPR, the court heard.

Nathaniel and Boadi ran the NVA Entertainment group, which brokered a deal with Ashley Cole to open a branch of US rapper Jay-Z’s restaurant chain.

Richards, Nathaniel and Boadi, both of Docklands; David Hylton, 47, from Holborn; brothers Andrew, 35, and Paul Johnson, 33, and O’Neil Wareham, 30, all from Harrow; Ferron Perue, 24, from Birmingham; Nugent Rowe, 29, from Pinner, and Scott Marius, 44, from Maida Vale, all deny murder and conspiracy to commit grievous bodily harm.

The trial continues.