The family of a man killed in a brawl after a penis was scrawled on his face have vowed fight for justice after the man who struck the killer blow was cleared of all wrong-doing.

Anthony 'Chillerman' Thompson, 26, died of a brain haemorrhage following a fight outside a house party in Holmbury Court, Tooting, on February 5 last year.

On Monday a jury at the Old Bailey ruled Thomas Evans, 32, was acting in self defence and cleared him of manslaughter.

Mr Thompson's family said his alleged friends betrayed him during the trial.

Mum Sheila Thompson, 49, and sister Kerry Thompson, 24, of Derinton Road, Tooting, said at first they came to visit every day.

More than 600 people showed up to Mr Thompson's funeral, while his friend 'Strapper' created a song played at the service.

But once the trial began all contact was cut off and damning evidence was given against their son, a courier and keen footballer.

The court heard a penis was scrawled on Mr Thompson's face by friend

Vanessa Barrows after he fell asleep on a sofa at the cocaine-fuelled house party.

At first he seemed to laugh off the insult, but then began challenging men at the party to fight.

His father Vic Ellis said: "They were his so called friends - you don't draw that on a friend's face - you don't know how someone is going to react, I blame that.

"We have been let down; they all know that - we have been betrayed."

Ms Thompson said: "I have not had a break since everything has happened. That was the last straw with him being found not guilty, there is no justice."

Mr Thompson's girlfriend, Anna Lane, said the couple were due to travel to Barcelona on holiday just two days after he died.

She said: "He wanted to make sure his mum and sister were alright, settle down, have kids, get his own house although he would probably have never left his mum.

"It could have been prevented if his real friends were there they wouldn't have let that happen to him."

Experts identified the first punch from Mr Evans as the fatal blow, though after he had floored Mr Thompson, CCTV showed him deliver a second volley of punches and kicks.

The family were left despondent when the judge told jurors nothing after the first punch should count when making their decision on the case.

They now plan to fight for a re-trial if they can find the money to go through the court system.

Mr Ellis said: "We are not giving up. We will pursue it with other avenues I won't stop until there is justice."