Campaigners marched to 10 Downing Street to highlight the “injustice” of the controversial joint enterprise law this week.
On Tuesday (March 17), more than 100 people - individuals and families of prisoners - waved banners raising awareness of joint enterprise before handing in a petition with 15,000 signatures to reform or abolish the law.
Trainee lawyer Charlotte Henry, 25, joined the march as her brother Alex Henry, of Homefarm Road, Hanwell, was found guilty of stabbing to death Taqui Khezihi, 21, despite him claiming to have never touched the knife.
Alex, aged 20, was sentenced aged to life imprisonment in March 2014 after the street fight in Ealing Broadway on August 6, 2013, left Mr Khezihi dead.
Ms Henry, who believes the march 100% made an impact, said: “We are marching for joint enterprise to be reformed or abolished in place of a fairer law so the guilty will be captured and the innocent will walk free.
“You should not be guilty of murder unless you intend to murder. I think it [joint enterprise] does capture guilty people, of course it does, but anyone can be at the scene of a crime not intending to be, in the wrong place at the wrong time.
“The day is about highlighting the injustice of joint enterprise and the unfair mandatory life sentences given to those who, at trial, are proven innocent of the actual murder yet still convicted of murder.
“Over-zealous prosecutors insist cases are a joint enterprise even when an incident is clearly spontaneous and unplanned.
"We are representing over 500 prisoners who are maintaining their innocence but we believe this is the tip of the iceberg.”
Ms Henry said they have applied for leave to appeal for her brother and are still waiting.
She added: “Failing an appeal we will be reforming this law. It’s not a question of if, it’s when.
"The criticism of joint enterprise is echoed throughout the legal system.”
Jimmy McGovern, whose multi award-winning film, COMMON, helped put joint enterprise into the public psyche marched in London with the families who inspired him to write the script.
Marchers were also accompanied by the film’s producer Colin McKeown and leading cast members: Susan Lynch (Thomas Ward’s mother), Andy Tiernan (JonJo’s father) and policeman Robert Pugh.
The Henry family appeared in Guilty by Association, a BBC documentary on Joint Enterprise, last year.