We're wrapping up our live coverage of today's latest news on the arrest of the man accused of fatally shooting a high-profile health insurance executive last week.

Before we go, here's what happened on Tuesday in relation to the case:

• Luigi Mangione appeared in court in Pennsylvania, where his lawyer contested a request from prosecutors in New York to have him extradited there to face charges including second-degree murder
• Mangione shouted as he entered court, and briefly struggled with police, but was silent as he was escorted out to be returned to pre-trial detention
• He was heard saying the words "completely unjust" and "an insult to the intelligence of the American people” as he entered - but it's not clear to what he was referring
• People who know him have shared stories of how they lost touch with him in the months before the alleged attack
• RJ Martin, a former roommate who was friends with him in Hawaii, said he had severe back pain that "prohibited him, at times, from just doing many normal things"

Read more:

• How the six-day hunt for New York shooting suspect unfolded
• McDonald's customer recounts moment CEO shooting suspect spotted
• What is a ghost gun, the weapon allegedly used in New York CEO shooting?

Luigi Mangione's mother is said to have reported him missing last month, according to local media reports.

She reportedly told authorities in San Francisco, California, she had not heard from her son since July.

San Francisco Police Chief Bill Scott told reporters on Tuesday that his office is in contact with detectives in New York, but he declined to comment on the missing persons report, according to local news outlet KRON-TV.

Friends have previously told US outlets Mangione left his surf community in Hawaii over the summer of 2023 to undergo spinal surgery.

One of his friends from Hawaii told the BBC on Tuesday Mangione didn't respond to his messages after he left the state.

"We had a normal dude friendship, so if one of us went radio silent for a couple months, it wasn't a big deal," said RJ Martin.

"There wasn't an expectation to pick up the phone on any certain interval, so it wasn't a red flag at all that I hadn't heard from him in about six months. I did reach out to him consecutively for three months in a row in the spring, and never got a response."

Mangione, who shouted to reporters and physically struggled with officers on his way into court this morning, was silent as he was led out to a vehicle that took him to pre-trial detention.

According to reporters in court, Mangione's lawyer was heard at one point telling him to keep quiet during the legal proceedings.

CBS News, the BBC's US partner, says that Mangione smiled during the hearing and seemed to be counting the number of people in the room.

According to the Washington Post, he interjected when investigators listed face masks as among the items allegedly found in his possession when he was arrested.

Mangione said that the face masks were related to the Covid-19 virus, the newspaper reports.

He was quickly hushed by his lawyer.

Jess Parker
BBC News, Pennsylvania

Thomas Maronick Jr, a lawyer and radio host who is close with members of the Mangione family in Maryland, has spoken to the BBC about Luigi Mangione's arrest.

Maronick begins by saying he was "shocked" and in disbelief to discover that Mangione came from the same wealthy and prominent family that Maronick has known for years.

"It's just hard to believe," says Maronick, who adds that he does not know the suspect personally.

He said: "When I heard that it was Luigi Mangione, I just I couldn't believe it. I was shocked. I first went to check to see if there was any connection to the family.

"I said: 'No, it can't be this. Can't be somebody related to the Mangione family. They've always been so great to me.'

"And sure enough, they put out a statement saying that they were shocked and horrified about this."

Speaking outside the Pennsylvania court where Luigi Mangione appeared earlier on Tuesday, his lawyer said the legal team opposes extradition to New York.

They "are going to fight this along the rules and with the constitutional protections that my client has", said attorney Thomas Dickey.

"You have to presume him to be innocent," the lawyer added.

"And none of us would want anything other than that if that were us in those shoes.

"So I'm glad he has some support."

Nada Tawfik
Reporting from New York

RJ Martin, a friend and former roommate of Luigi Mangione who knew him while they were in Hawaii, tells the BBC his former surf mate's back injury "prohibited him, at times, from just doing many normal things."

Mangione's last known address was Honolulu in Hawaii, where he spent time in a co-living surfing community called Surfbreak, which Martin founded.

Martin recalls that after Mangione's first day of surfing, he was bedridden for nearly a week.

"He never complained about being in pain or things he couldn't do. Only after the fact, would he say, 'oh, sorry, I couldn't, you know, come to volleyball or surf because my back was hurting me that much'," Martin says.

Martin adds: "He never once complained about what was going on with the doctors or the medical system, specifically, what he was dealing with."

Martin says that members of the surf community in Hawaii are shocked to learn of Mangione's arrest.

"I'm just absolutely devastated," he says.

A statement from New York Governor Kathy Hochul is out, assuring the public that she will work to bring the suspect back to New York for prosecution.

Luigi Mangione earlier contested an extradition order during a court hearing in Pennsylvania, where he was arrested on Monday.

"I am co-ordinating with the District Attorney's Office and will sign a request for a governor's warrant to ensure this individual is tried and held accountable," Hochul says.

"Public safety is my top priority and I'll do everything in my power to keep the streets of New York safe," she adds.

Speaking about the extradition fight, Mangione's lawyer Thomas Dickey said: "We’re going to fight this along the rules and with the constitutional protections that my client has."

Mike Wendling
US digital reporter

In the days since the killing, there has been a very vocal online contingent criticising the health insurance industry or even celebrating murder suspect Luigi Mangione.

The health insurance industry – in all of its expensive complexity - is reviled by many Americans for often failing to provide fair, easy-to-understand coverage at an affordable price.

And since last week, apparent support for the suspect - which police have condemned - has spread online.

Google has shut down reviews of the McDonald's restaurant where the suspect was arrested after the page was flooded with comments; online retailers such as Amazon and Etsy have banned accounts that sell gear appearing to promote the killing; and thousands of dollars have been donated online to support Mangione's legal defence, with police officers who arrested Mangione in Pennsylvania also receiving death threats.

The words “delay”, “deny”, “depose" on shell casings found at the scene of the crime seemed to point to a motive. Police also allege Mangione wrote a document that showed “some ill will towards corporate America”.

And his online presence could give some clues as to Mangione’s personal experience with the healthcare system. One of his former roommates at a co-living and co-working community in Hawaii told the BBC that Mangione had a back injury. The banner image on Mangione's X account shows an X-ray of a spine with hardware in it.

Read more: Killing of insurance CEO reveals simmering anger at US health system

Image source, Getty Images

More now from the White House, which has denounced the killing of UnitedHealthcare CEO Brian Thompson, saying that “violence to combat any sort of corporate greed is unacceptable".

The internet is flooded with expressions of support for the suspected killer, with many citing the country's expensive and convoluted insurance system and pervasive wealth inequality.

White House Press Secretary Karine Jean-Pierre was asked by reporters at a briefing on Tuesday whether Americans are "treated fairly by their insurance companies".

She started by saying she needed to be careful about commenting on an open investigation, noting that the question about health insurance companies "is indeed connected to this case".

"I don't want to speak to what has been said by this particular individual," Jean-Pierre said.

She added: “Obviously, this is horrific. Violence to combat any sort of corporate greed is unacceptable."

Police in New York are referring to the handwritten three-page note allegedly found during Luigi Mangione's arrest as a claim of responsibility for the fatal attack on Brian Thompson.

Intelligence officers with the NYPD tell CBS News, the BBC's US partner, they believe that the suspect's grievances about UnitedHealthcare and other health insurance companies are what motivated the killing.

They say he may have been inspired by Ted Kaczynski, the anti-technology activist who launched a 20-year bombing campaign on academics and executives and named "Unabomber" by the FBI for his attacks on university and airline targets.

Police say they are concerned that the crime may serve to inspire other violent extremists, and are afraid of copy cats.

Authorities have been calling on the public to reject violence, with the governor of Pennsylvania saying on Monday: “The suspect is a coward, not a hero.”

Nada Tawfik
Reporting from New York

Not long ago we broke the news that Luigi Mangione, the chief suspect in the killing of health boss Brian Thompson, is contesting his extradition order to New York.

Jeffrey Lichtman - a defence lawyer who represented Mexican drug lord "El Chapo" and others - says it is difficult to know how long it could take to extradite Mangione, adding it could take potentially a couple more weeks.

Lichtman says that because of Mangione’s mental state from his health issues - which are said to include a back injury - he may have a viable Extreme Emotional Disturbance defence in New York. That could reduce any potential sentence.

Lichtman adds that Mangione might be using any extra time before extradition to fashion a defence based on "diminishing mental state".

"Every word out of his mouth, every action he takes needs to be done with a possible psychiatric defence in mind,” he tells me.

"Perhaps fighting extradition allows the defence more time to prepare a defence while he’s out of state," he says.

Jessica Parker
BBC News, Altoona, Pennsylvania

A witness at the McDonald's restaurant where suspect Luigi Mangione was arrested on Monday has told the BBC he thought his friend was joking around when he pointed out the likeness between a patron and the alleged gunman.

"I thought he was kidding. You know what I mean?" says Larry, who reported the suspect before his arrest at the restaurant in Pennsylvania.

Larry, who declined to give his last name, said he had gone to the McDonald's in the town of Altoona for a coffee with a group of "five or six" friends before attending church.

He said his friends noticed Mangione in the restaurant, when he ordered and took a seat in the back.

Asked for his thoughts on one of the most-wanted suspects in the US being arrested at his local fast-food restaurant, Larry said he was "a little bit surprised".

"But I'm not really surprised, you know?," he added.

"I mean, the way the world is right now, it's pretty crazy."

Read more here

The White House has offered up its condolences to the "loved ones" of health insurance boss Brian Thompson, who was killed last week in New York.

Speaking at a daily White House press briefing, press secretary Karine Jean-Pierre tells reporters: "We are certainly tracking the latest regarding this deadly shooting."

"We are grateful to law enforcement for apprehending the suspect, and we stand ready to provide further support if needed. And so while we're certainly not going to comment on the investigation, we condemn, we condemn violence in the strongest term."

• On 4 December, UnitedHealthcare CEO Brian Thompson was fatally shot multiple times in what police described as a "premeditated, preplanned targeted attack"
• The crime occurred in plain view outside the New York Hilton hotel in midtown Manhattan in the early hours of Wednesday morning around 06:44 local time
• The suspect fled on foot before jumping on a bicycle and riding into Central Park, where he disappeared from view
• During the days-long manhunt, which included police dogs, drones and a dive team, police found multiple pieces of evidence, including shell casings that read "deny", "defend", "depose"
• Police arrested Mangione on Monday after a McDonald's employee in Altoona, Pennsylvania, spotted him and called authorities
• He faces multiple charges in Pennsylvania and New York, including second degree murder

Jessica Parker
BBC News correspondent in Pennsylvania

Luigi Mangione’s lawyer - who has not been appointed by the court - has told a hearing in Pennsylvania his client is contesting extradition to New York.

The judge in Pennsylvania has denied Mangione's bail.

The suspect appeared in court dressed in an orange jumpsuit.

Luigi Mangione has just entered a courtroom in Pennsylvania for an extradition hearing that will determine whether he is sent to New York where health care executive Brian Thompson was fatally gunned down.

If you are just joining us, here are the top lines:

• New York officials have filed an arrest warrant for Mangione, charging him with five counts, including second degree murder and criminal possession of a weapon
• He also faces multiple charges in Pennsylvania, including providing a fake ID to police, forgery and illegal possession of a gun
• He appeared in a Pennsylvania court on Monday evening after being spotted at a McDonald's in Altoona, Pennsylvania, earlier in the day
• Other charges he faces in New York include two counts of second degree weapons possession and one count of criminal possession of a forged instrument
• In Pennsylvania, he also faces charges for possessing a gun without a license and tampering with records of identification

Stay with us for updates.

More details have been emerging of who Luigi Mangione - the lead suspect in the killing of UnitedHealthcare CEO Brian Thompson - is.

He was born and raised in Maryland and has ties to San Francisco, California, according to New York Chief of Detectives Joseph Kenny.

He has no prior arrests in New York and his last previous address was in Honolulu, Hawaii, police said.

He is from a prominent Baltimore family, and attended a private, all-boys high school in Baltimore, called the Gilman School, according to school officials.

Mangione was named as his high school valedictorian, which is usually the student with the highest academic achievements in a class.

You can read more about Mangione here.

Image source, Getty Images

We're kicking off our live coverage today with news that lead suspect in the killing of the UnitedHealthcare CEO last week in New York, Luigi Mangione, shouted angry remarks on his way into court just now.

While being escorted into a court in Pennsylvania for an extradition hearing to New York City, he shouted words that included: "…an insult to the intelligence of the American people".

Yesterday police found the 26-year-old in a McDonalds in Pennsylvania, after being tipped off by staff.

Mangione faces multiple charges, including murder.

Stay with us as we bring you more updates.