Bodycam footage of the altercation is expected to be released later on Friday evening.
His family said the “very horrific” video showed officers savagely beating the FedEx worker for three minutes in an assault their lawyers likened to the Los Angeles police attack on motorist Rodney King in 1991.
Five sacked officers, who are all black, have been charged with second-degree murder and other crimes, including assault, kidnapping, official misconduct and official oppression, over Mr Nichols’s death.
Civil rights lawyer Ben Crump, who is representing his family, said when the public watches the footage they will see him calling out for his mother.
He said: “When you all see this video, you’re going to see Tyre Nichols calling out for his mum.
“He calls out three times for his mother. His last words on this earth are, ‘mum, mum, mum’. He’s screaming for her. When you think about that kidnapping charge, he said ‘I just want to go home’.”
“It’s a traffic stop for God’s sake. A simple traffic stop.”
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Mr Nichols’s mother, RowVaughn Wells, told reporters: “For a mother to know their child was calling them in their need and I wasn’t there for him. Do you know how I feel right now? Because I wasn’t there for my son.”
Ms Wells recalled she had “a really bad pain in my stomach” and once she found out what happened she realised “that was my son’s pain that I was feeling”.
“For me to find out my son was calling my name, you have no clue how I feel right now,” she added, struggling to hold back tears.
She also said she had not yet seen the video but urged anyone with children not to let them watch it.
“I have never seen the video but what I have heard is very horrific.”
She added the charged officers had “disgraced their families”.
“I want to say to the five police officers who murdered my son, you also disgraced your own families when you did this.
“But I am going to pray for you and your families. Because this shouldn’t have happened. We want justice for my son.”
She has pleaded for peaceful protests.
Police pulled Mr Nichols over for alleged reckless driving before there was an “altercation” where officers used pepper spray on him, according to Shelby County district attorney Steve Mulroy.
Mr Nichols then tried to flee on foot and another altercation followed, he added.
His family say the officers beat him and the injuries he sustained during the encounter led to his death.
Relatives accuse police of causing him to have a heart attack and kidney failure. Authorities have only said he experienced a medical emergency.
The officers were assigned to the ‘scorpion’ unit which focuses on violent street crime. The family’s lawyers want it to be disbanded.
Memphis police chief Cerelyn Davis has said the department will review scorpion and other specialised units.
President Joe Biden said the Nichols family and the city of Memphis deserve “a swift, full and transparent investigation”.
“Public trust is the foundation of public safety, and there are still too many places in America today where the bonds of trust are frayed or broken,” he added.
Countries in South and Southeast Asia have been coping with a weeks-long heatwave which has seen record temperatures sweep parts of the region.
Pupils in the Philippines, India and Bangladesh have been told to stay at home and learn remotely due to a severe health risk.
Schools in Cambodia have also cut back on their hours.
Cambodia faces its hottest temperature in 170 years, according to meteorologists – as high as 43C (109F).
Bangkok in Thailand has reached 40C (104 F), but the heat index is said to have topped 50 C (122 F) due to the heat being trapped among the mass of buildings.
The United Nations Children’s Fund warned in April that the heat could put the lives of millions of children at risk and asked people who care for them to take extra precautions.
A spokesperson for UNICEF said around 243 million children were exposed to hotter and longer heatwaves.
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They said the increased heat was “putting them at risk of a multitude of heat-related illnesses, and even death”.
Thirty people in Thailand have died from heatstroke in the past month, according to data from the country’s health ministry.
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People are being advised to avoid outdoor activities and to stay hydrated.
Several towns in Myanmar were included on lists of the hottest spots globally last month, with temperatures reaching 48.2C (118F) in at least one case.
Parts of eastern India also experienced their hottest April on record.
Kerala, on India’s west coast, this week instructed all schools and colleges to close until Monday, while influencers in Bangladesh have encouraging people to plant trees in response to the record heat.
Benjamin Horton, director of the Earth Observatory of Singapore, said there were three factors for heatwaves: a naturally-occurring climate phenomenon known as El Nino, an increase in global temperatures, and human-induced climate change.
Philippine coastguard spokesman Jay Tarriela told Sky News that this week’s confrontation was the first time China had used “such aggression” against their ships.
“The metal parts and the railing were bent. The canopy was also destroyed. So this came as a surprise for us that China never hesitated to use brute force,” he said.
“It completely justifies us calling The People’s Republic of China a bully country.”
The Philippine coastguard was on a resupply mission to the Scarborough Shoal to deliver food and fuel to Philippine fishermen when they were struck.
The submerged reef lies in disputed waters. China claims sovereignty over the reef but it is much closer to the Philippines and lies within its legally recognised exclusive economic zone.
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The vessel Sky News was on board was the closest the coastguard had ever been to the shoal – just 600 metres away from it.
Asked if the mission to the shoal was a provocative move by the Philippine coastguard, Commodore Tarriela denied they were “poking the bear” but rather “driving the bear out of our own territory”.
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4:26
Sky witnesses China-Philippine confrontation
The Philippines has been stepping up its patrols in the area under the instruction of President Bongbong Marcos, and reasserting its claim to the shoal in recent months.
It has raised the spectre of open conflict. While neither side currently wants that, there is now a greater threat of open conflict.
Asked what the end game was for the Philippines, Commodore Tarriela said their priority was to “tell the world” about China’s aggression.
He said their secondary goal was to ensure “like-minded states” also made China “fall in line and respect international law”.
Philippine government policy is not to resist using water cannon against Chinese vessels – and Commodore Tarriela insisted that policy remains in place after the confrontation.
The government also remains intensely determined to protect the waters it believes it has every right to operate in.
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“We’re not going to yield and we’re not going to surrender a square inch of our territory,” Commodore Tarriela insisted.
Beijing has called the action its own coastguard took as “necessary”.
Speaking at the Chinese foreign ministry’s daily news conference, spokesperson Lin Jian described the coastguard’s conduct as “professional, proper, and lawful”.
Three suspects have been charged by Canadian police over the killing of a Sikh separatist leader in Vancouver last June, in an incident that sparked a diplomatic spat between Ottawa and New Delhi.
Hardeep Singh Nijjar, 45, was shot dead outside a temple by masked gunmen in Surrey, outside Vancouver, on 18 June 2023.
Royal Canadian Mounted Police assistant commissioner David Teboul said police could not comment on the nature of the evidence or the motive.
“This matter is very much under active investigation,” Teboul said.
The three suspects – Indian nationals Kamalpreet Singh, Karan Brar and Karampreet Singh – were arrested in Edmonton, Alberta, the Royal Canadian Mounted Police said.
Superintendent Mandeep Mooker said: “This investigation does not end here. We are aware that others may have played a role in this homicide and we remain dedicated to finding and arresting each one of these individuals.”
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1:18
Canada killing ‘linked’ to India govt
Canadian Prime Minister Justin Trudeau sparked a diplomatic feud with India when he said in September that there were “credible allegations” of Indian involvement in the killing. India angrily denied involvement.
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Mr Nijjar, an Indian-born citizen of Canada, was a leader in what remains of the Khalistan movement – a once-strong group calling for the creation of an independent Sikh homeland.
He was organising an unofficial referendum in India for an independent Sikh nation at the time of this death and had denied allegations of ties to terrorism.
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The Khalistan movement has lost much of its power but is still supported by some in the Punjab state in northwestern India and in the Sikh diaspora overseas.
A violent, decade-long Sikh insurgency shook north India in the 1970s and 1980s, and was ultimately crushed in a government crackdown which saw thousands of people killed, including prominent Sikh leaders.
In June 1984, Indian forces stormed the Golden Temple, the holiest Sikh shrine in Amritsar, where separatists had taken refuge.
In more recent years, the Indian government has repeatedly warned that Sikh separatists were trying to make a comeback.
The Indian government said it “completely rejected” Mr Trudeau’s allegations and added: “We are a democratic polity with a strong commitment to rule of law.”