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A Dartford man is one of five gang members to be jailed for a total of 55 years over their involvement in the murder of Marcus Innocent.
The Old Bailey heard how the group set upon an innocent victim who was subsequently fatally shot during the same attack.
Perry Sutton, of Downs Farm, Green Street Green Road, was locked up for 10 years after he was found guilty of conspiracy to commit GBH in Woolwich on July 25.
The 26-year-old was cleared of murder and possession of a firearm with intent to endanger life.
He had been found not guilty at the first trial of possession of ammunition and possession of a firearm.
He was found not guilty of murder on July 25.
Jack Brennan, 22, of Appleton Road, Kidbrooke has been sentenced to 11 years’ imprisonment after he was found guilty of conspiracy to commit GBH on July 25.
He was found not guilty of murder and possession of firearm with intent to endanger life.
Patrick Brennan, 24, of Appleton Road, Kidbrooke has been sentenced to 11 years’ imprisonment after he was found guilty of conspiracy to commit GBH on July 25.
He was found not guilty of murder and possession of firearm with intent to endanger life.
Sonny Murphy of Hither Farm Road, Kidbrooke, was sentenced for four years for perverting the course of justice and three years for possession of a firearm having earlier pleaded guilty to both offences.
These are to run concurrently.
Also at the first trial was Keli-Ray Birch, 22, of Corelli Road, Shooters Hill, London was found guilty of conspiracy to commit GBH.
He was found not guilty of murder and possession of firearm with intent to endanger life. He will be sentenced at a later date.
Previously, Daniel Burgess, 34, of Weardale Avenue, Dartford, was found guilty of murder at the Old Bailey and must serve a minimum of 28 years before being considered for parole.
He was convicted for possession of firearm with intent to endanger life in relation to the murder at the first trial.
Burgess shot Mr Innocent dead in Lord Warwick Street in Woolwich during a gang feud.
On November 19, 2012 a group of up to 20 men armed with a shotgun and other weapons travelled in six cars from Kidbrooke to Woolwich to confront members of another gang in an ongoing feud.
Failing to locate any of the other gang members, Mr Innocent was singled out and attacked and then dragged into a car park, where he was shot at close range and died at the scene.
During the trial, the court heard how gunman Burgess confessed to his wife, but said he had shot Mr Innocent by accident.
Sutton stated that this incident occurred in retaliation to damage caused to the car of Jack Brennan earlier in the day by a rival gang member.
Jack Brennan's brother Richard Brennan provided the gun to Burgess.
Jack Brennan and another brother, Patrick Brennan, brought the group together in order to carry out the offence.
A number of other defendants face a further re-trial for conspiracy to commit GBH this month following a previous hung jury.
DC Toby Carroll said: "Marcus Innocent was not involved in gangs, however he was wrongly set upon by what we believe was a 20-strong gang over a feud they had with another man, about a broken car window.
"He was punched, kicked and shot dead for no reason. This has and continues to be a long and protracted investigation with a subsequent trial, however I hope the fact that Daniel Burgess is already serving a life sentence coupled with today's sentences will bring some sense of justice to Marcus' family.
"Trident remains committed to relentlessly pursuing those involved in gun crime and place these criminals before the courts."
DCI Chris Le Pere said: "These substantial sentences show our commitment to ensuring those who use firearms in London will be punished.
"I must thank my team for conducting a thorough and tenacious investigation and the brave witnesses who assisted in what proved to be a very challenging case.
"I do hope that these results provide some closure for the members of Marcus's family, who have shown dignity and extreme patience throughout this judicial process.
"If you have any information regarding gang, gun or knife crime you can call Crimestoppers anonymously on 0800 555111.
"I would like to reassure any potential witnesses who may be worried about making contact with police that Trident has extensive expertise in protecting witnesses and there are a range of measures that can be taken to protect you."