Prime Minister Sir Keir Starmer says there are "serious questions for police" after the release of bodycam footage showing how officers responded to the murder of Henry Nowak.

Vickrum Digwa, 23, was jailed on Monday for a minimum of 21 years for stabbing the teenager with a 21cm (8in) blade he said he carried as part of his Sikh faith.

Bodycam footage shows the 18-year-old Southampton university student being handcuffed and telling police "I can't breathe" after Digwa lied to officers at the scene of the stabbing, claiming he had been the victim of a racist attack.

On Tuesday evening, several hundred people gathered in Southampton, with clashes between protesters and riot police.

Police chiefs are re-examining anti-racism commitments that suggested officers should treat ethnic minorities differently in order to ensure equality of outcomes.

The National Police Chiefs Council (NPCC) said it was listening to concerns raised by MPs and would make changes where needed.

Last year the NPCC published a document of "anti-racism commitments". Racism, it said, was a "very real issue in policing" and achieving equality of outcomes for people from different ethnic groups did not mean "treating everyone 'the same'" but responding to their specific "circumstances and experiences".

It is not formal policy or training but the Conservatives said it was wrong to treat people differently based on the colour of their skin.

A source close to Home Secretary Shabana Mahmood said the wording in the document was clumsy and the Chair of the NPCC, Chief Constable Gavin Stephens, said "where needed we can and will make changes".

Mahmood described the unrest in Southampton as "completely unacceptable".

She said the Nowak family had made a "powerful call" on Monday to "not let Henry's death be used to create further division, hatred or tension".

"There can be no justification for hijacking this tragedy to stir up violence and disorder," she added.

Speaking to broadcasters earlier on Tuesday, Sir Keir said the bodycam footage was "really harrowing" and he had "felt sick watching it".

The question of "how accusations of racism informed decision making" must be addressed, he said.

Police watchdog the Independent Office for Police Conduct (IOPC) said an ongoing investigation into the police force's actions was expected to report within the next three months.

Sir Keir said he would not rule out a wider inquiry into the matter.

Conservative leader Kemi Badenoch said the arrest footage was "awful" and there had been "multiple failures". She challenged Sir Keir to respond more strongly, comparing the Southampton case with the killing of George Floyd in the US in 2020.

"I haven't really seen enough of a response," she told BBC Newsnight. "I'd like to see more."

Badenoch said that when the prime minister had been Leader of the Opposition "and the George Floyd incident happened, they were taking the knee for something that happened in another country".

"I want them to take as seriously what is happening in this country, what they did with George Floyd," she said.

The death of the African-American man in police custody sparked the Black Lives Matter protest movement.

Warning: This story contains details some may find upsetting

Earlier, Mahmood called out a "dangerous undercurrent" in the wake of the killing, which she said was leading to threats.

A police officer was "forced to relocate to protect himself and his family" after being wrongly identified online as being involved in the case, she said.

In an address to the House of Commons, Mahmood warned against opposition MPs politicising the case.

Reform UK leader Nigel Farage told reporters he had a sense of "cold rage" at the treatment of Nowak and labelled it evidence of a "two-tier Britain".

"A false accusation of racism counted higher at that moment than someone that was dying," he said.

In a statement to the House of Commons, shadow home secretary Chris Philp said the "police appeared more concerned with the accusation of racism… than they were with helping Henry".

Badenoch told Newsnight: "I think, that had the murderer been white, they would have asked a few more questions but they jumped to a conclusion."

Responding to Farage's remarks, she said: "What we don't need is rage, because what rage will do is cause someone else's child to get hurt."

Mahmood said that while it was for the IOPC to determine the facts of the specific case, "everyone in this country is equal before the law".

The prime minister's official spokesman said there was "no such thing as two-tier policing".

Labour MP Tanmanjeet Singh Dhesi, himself a Sikh, accused Reform UK and other parties of deciding to "scapegoat" the Sikh community "based on the actions of one violent murderer."

On Tuesday evening, riot police clashed with protesters who had gathered near the scene of the murder.

The protest was promoted by far-right figure Tommy Robinson.

Bins, some bricks and an e-scooter were thrown at police, while officers with riot shields and batons attempted to hold a line along a street.

The attorney general's office is considering the jail sentence given to Digwa after receiving "multiple requests" to review it under the unduly lenient sentence (ULS) scheme.

Under current legislation, practising Sikhs have a legal defence for wearing a small, curved blade known as a kirpan close to their body for religious purposes.

While Digwa had been wearing a traditional kirpan under his clothing, the weapon he used on Nowak was much bigger and he had worn it in a sheath on top of his clothes.

Digwa's family apologised to Nowak's family and for bringing the Sikh community into "disrepute".

"We love Vickrum," an unnamed family member said in a statement. "We will continue to love him. That love does not stand in opposition to the sorrow we feel for the Nowak family."

In her address, Mahmood said she "echoed" the comments of the prosecutor in the case, who said: "This is not a case about Sikhism, this is not a case about racism, this is a case about murder."

That quote was also cited by Nowak's family, who called his treatment by police "inhumane and degrading" and the force has apologised.

His dad, Mark, said: "Henry told officers that he could not breathe nine times.

"He told them that he had been stabbed four times.

"Henry was pulled across the gravel, his hands forced behind his back and he was placed in handcuffs."

He said the contrast between how his son and Digwa had been treated was "unbearable".

Three of the officers involved are still serving, and one has resigned, a spokesperson for Hampshire & Isle of Wight Constabulary said.

Donna Jones, the police and crime commissioner for Hampshire and the Isle of Wight, has requested a review of the culture and performance of the police force's control room and the training of officers responding to the stabbing.

In the bodycam footage, a police officer can be heard asking Nowak: "You've been stabbed, whereabouts?" before adding: "Don't think you have, mate."

While being handcuffed, Nowak says "I can't breathe" multiple times.

Later in the footage, Nowak, who seems unresponsive, is told he is being arrested for assault.

In his sentencing remarks on Monday, Judge William Mousley KC said that no matter how quickly Nowak had received "first aid, CPR or expert medical treatment", he would not have survived because of the nature of his injuries.

Separately, Digwa's father Moga Singh, 52, and brother Gurpreet, 27, faced court on Tuesday afternoon on weapons charges, and were released on unconditional bail.

His mother Kiran Kaur, 53, was previously found guilty of assisting an offender after she attempted to hide the blade used in the attack. She will be sentenced on 17 July.

Additional reporting by Curtis Lancaster and Peter Cooke

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