The family of a black man murdered in 1959 is demanding access to the police file on his unsolved killing.

Kelso Cochrane was stabbed to death on a west London street, in what’s believed to have been a racist attack. Nobody was ever charged for the crime.

The Metropolitan Police says the file is not available to the public because the case is still open.

The family lawyer says this secrecy is not justified, and the family is ready to take legal action if necessary.

The murder is arguably one of the most significant events in black British history.

At the time of his death, the 32-year-old was living in London, working as a carpenter and planning to study law.

Kelso Cochrane had been born in Antigua, and had arrived in England five years before, following a spell in the US. He had been married there, but the relationship had broken down.

Listen to the radio documentary, The Murder of Kelso Cochrane, on BBC Radio 4 at 20:00 BST on Monday 21 August, or 11:00 BST on Wednesday 23 August, or afterwards on BBC Sounds

He had also left two young daughters in the US, to whom he still sent toys – dolls, tea sets, and skipping ropes. One of them, Josephine, says that these “little things” gave her “the impression that he was a loving father and that he cared”.

Like many other members of the Windrush generation, Cochrane was living in the west London area of Notting Hill. It was one of the few parts of the city where new immigrants from the Caribbean could find housing, although it was often expensive, overcrowded and in poor condition. The area was also home to a well-established white working class population.

On the evening of 16 May 1959, Cochrane paid a visit to his local hospital, Paddington General. His thumb was painful after an injury at work.

On his way back home, he was attacked by a group of five or six white youths. Witnesses said they saw them encircling him, kicking, hitting. One jumped on his back.

Two Jamaican men walking past saw the incident and ran to help. Cochrane was able to stand, so they got him into a taxi and took him to St Charles’ Hospital in nearby North Kensington.

Cochrane didn’t seem to be bleeding heavily, but he’d been stabbed in the heart with a thin blade. By the time they arrived at the hospital, he was in severe shock. He died there, just before 01:00.

By 04:00 news of the death had made the newspapers. A late edition of the Sunday Express that morning carried a flash headline: “Murder in Notting Hill”.

Notting Hill had already become identified with racial tension. In the previous summer of 1958, riots lasting several days had broken out in the neighbourhood.

The riots ended in early September, but for black residents the undercurrent of violence persisted.

Far-right groups had become active in the area, including the Union Movement of Sir Oswald Mosley. In spring 1959, another group, the White Defence League, had set up an office in the heart of Notting Hill, saying it would “campaign for white interests”.

But for all the tension, nobody had been killed in a racist attack – until Kelso Cochrane.

The police inquiry was led by Det Supt Ian Forbes-Leith. He had a team of 20 officers at his disposal.

The investigation quickly focused on a party, which had been taking place close to where Cochrane was attacked on Southam Street.

Several guests were brought in for questioning. Two were held for more than 48 hours – Patrick Digby, a 20-year-old merchant seaman, and John “Shoggy” Breagan who was 24. They were later released without charge.

The police were quick to dismiss the idea that racism was the motive. Det Supt Forbes-Leith told the press that the stabbing had “absolutely nothing to do with racial conflict”. He suggested the motive could have been robbery.

That wasn’t what it looked like to many in Notting Hill’s black community. John Prince, a friend of Cochrane, told the BBC in 2006 that it had been frightening: “Suddenly now you’re faced with the possibility of being murdered just because of who you were as a person.”

On 6 June 1959 hundreds of people – black and white – gathered for Cochrane’s funeral, lining the streets of Notting Hill, following his coffin to nearby Kensal Green Cemetery.

In the wake of the murder, the activist Claudia Jones and others set up the Inter Racial Friendship Co-ordinating Council, which paid Cochrane’s funeral costs, organised silent protests in Whitehall, and pushed for laws against racial hatred.

Over time, the police inquiry was wound down.

Decades later in 2006, Cochrane’s older brother Stanley came to England for the first time. He wanted to find out who killed his brother. A BBC documentary team followed him.

The investigative journalist Mark Olden tracked down Patrick Digby and John Breagan but neither were willing to meet Stanley. Both denied involvement in the murder. Stanley asked to see the police file but was only allowed to see an abridged version.

Among those who saw the programme was Pat Digby’s step-daughter, Susie Read. She contacted Olden, and told him she remembered Digby’s friends baiting him with an odd name – “Oslo” or “Kelso”.

She has now told us that once during an argument, she had challenged Digby about the accusation: “He said, ‘Well, if I did, you could never prove it.’ I said, ‘Did you kill him? He said, ‘Yeah’.”

Digby died in 2007.

Olden kept digging. He spoke to a guest at the Southam Street party, who told him Digby had come back after the attack, and confessed to people there.

He spoke again to John Breagan, who said that he and Digby had left the party together before the murder. When first asked why by the police, one of them said it was to look for girls, the other said it was to have a fight. But when detained in the police station, they were held in adjacent cells. Breagan told Olden that this had allowed them to “straighten” their stories. Breagan died in 2019.

In 2011 Olden published a book, Murder in Notting Hill, which prompted Kelso Cochrane’s daughter Josephine to contact him. Growing up in New York, she knew her father had died, but until then hadn’t realised he’d been murdered.

Josephine is now at the centre of the family’s efforts to get the police files opened. She told us that as she hadn’t known her father growing up she wanted to know “everything” about his murder and the investigation “before I die”.

The investigation file into Kelso Cochrane’s murder has been transferred to the National Archives in Kew, but it will remain closed from public view until 2054 – after Josephine’s 100th birthday.

It’s not uncommon for unsolved murder cases to be restricted for up to 100 years – this is so they only become public after all those involved have died.

But some unsolved murder files from London in the same period are open, such as that of Freda Knowles, murdered in 1964, or Ernest Isaacs, shot dead at his home in 1966.

Crime historian Dr Mark Roodhouse, of the University of York, uses police files from the mid-20th Century for his research. He says he’s surprised that the Kelso Cochrane file is still restricted.

In spring 2020, I made my own Freedom of Information (FOI) request for the Cochrane file to be opened early, on public interest grounds.

I’ve succeeded in getting other files opened early, notably dozens of files on institutional child sex abuse just after the Jimmy Savile scandal.

On this occasion, however, my request was turned down.

The Met Police said then the Cochrane case was considered open, and that “new scientific techniques” meant that “cases hitherto considered unsolvable, are being examined afresh”.

I was also told that releasing the files would cause the family “immediate mental distress”. However, it is Cochrane’s family who now wants the file released.

What’s more, the main suspects are dead and it is difficult to point to any evidence that could be subject to “cold case” techniques. The BBC documentary team were told in 2006 that Kelso Cochrane’s clothes had been destroyed in the late 1960s.

We went back to the Metropolitan Police this summer, asking them to explain why the Cochrane family was unable to access the file. They told us that “as with all unsolved murders this case is not closed and any evidence that comes to light will be assessed and investigated accordingly”.

They said that officers from the Special Casework Team had made efforts to engage with Mr Cochrane’s family, via their legal representatives, with a view to discussing details of this murder investigation – but that these efforts had so far been unsuccessful.

Daniel Machover, the lawyer acting for the Cochrane family, says the family will pursue a formal route to obtain the file – challenging the reasons previously given to withhold it.

He has obtained multiple statements to support the request, from Kelso Cochrane’s immediate and extended family, and from journalists who have tried to obtain the file over many years, including myself.

Machover has also provided the death certificates of the key suspects, and others who are likely to have been significant witnesses in the case.

He says it’s too late for criminal justice, but the family hopes there will be something in the file that “at least gives them a picture, a flavour, an idea of what was done to try to secure a criminal charge and a criminal prosecution”.

Machover has represented many black families in dispute with the Met Police. He believes there is a need to acknowledge the events of the past to deal with mistrust today.

Comparisons have been drawn with the murder of the south London teenager, Stephen Lawrence, in 1993 – in both cases, there was a reluctance by the Met Police to name racism as the motive, and an initial failure to charge anyone for the crimes.

Less than a mile from where he was attacked, a street has been named after Kelso Cochrane, as well as a new block of social housing.

Members of the Cochrane family are grateful for the recognition but they still want something more.

Millicent Christian, the daughter of Cochrane’s cousin, says that Stephen Lawrence’s mother Doreen eventually achieved “some kind” of justice. “We’re looking for that same kind of justice for our Kelso.”