
Lester Holt reports on the murder of UnitedHealthcare CEO Brian Thompson and the investigation into accused shooter Luigi Mangione, revealing exclusive new details and insights.
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Lester Holt
Tonight on Dateline.
Detective Sergeant John Griffin
He stepped out from behind the suv. He knew exactly what he was doing.
Lester Holt
There was no hesitation inside the case of Luigi Mangione, accused in the brazen murder of healthcare CEO Brian Thompson.
Jeff Alter
Brian was a lifelong friend. He was a wonderful person, a great father.
Lester Holt
A close friend of the victim. And two detectives involved in the manhunt speaking out for the first time.
Detective Sergeant John Griffin
There's a lot of her. This guy took somebody's life. He's dangerous.
Detective Joe Mitsopoulos
When he lowered the mask, that's when we were like, oh, we got something here.
Detective Sergeant John Griffin
The eyebrows were quite distinguishing.
911 Operator / Police Dispatcher
He looked like the CEO shooter.
Sam Beard
People were trying to learn who this person was. This was like an all American boy.
Dorian Wright
They walked in the door and all the girls turned their head.
Christian Sacchini
The Luigi I met that night wouldn't be capable of what he's accused of.
Lorena O'Neill
This was targeted. He allegedly had writings about health care.
Jeff Alter
I cannot understand how this person is seen as a hero.
Lorena O'Neill
What does this say? If violence is being celebrated, what does that say about our country?
Lester Holt
A notorious murder here on the streets of New York sparking both fury and fascination. New details and where the case might go from here. I'm Lester Holt and this is Dateline. Here is a killing in midtown. In the pre dawn darkness of December 4, 2024 on the mostly empty Manhattan streets, one man was up and ready for what was sure to be a busy day.
Jeff Alter
No shock to me that Brian was up and the first one arriving at that hotel.
Lester Holt
Brian Thompson, the CEO of UnitedHealthcare was walking into this Hilton hotel for the company's annual investors conference. Jeff Alter is his friend and former colle.
Lester Holt (interviewer)
In your industry, this is a big game.
Jeff Alter
It's really Our one opportunity to show who we are and what we're planning on doing in the upcoming year.
Lester Holt
Jeff says the all day conference required months of preparation. And Brian likely would have been working late the night before.
Jeff Alter
I knew how tough those days were. And I had texted Brian from the train, you know, good luck today.
Lester Holt (interviewer)
So you texted him a note of encouragement?
Jeff Alter
Yep.
Lester Holt (interviewer)
Did he respond?
Jeff Alter
He didn't.
Lester Holt
What his friend didn't know was that someone else had also been preparing for this day. Brian was walking into a trap. Did he sense the man approaching? In a flash of violence, the paths of these two strangers intersected. The masked man fired three shots before fleeing, leaving Brian to die on the sidewalk.
Grainger Narrator
Breaking news, a shooting in Midtown.
Dorian Wright
50 year old Brian Thompson was shot multiple times.
News Reporter
Detectives.
Lester Holt
Still, the response was immediate and intense.
News Reporter
Police searching for that brazen gunman.
Lester Holt
A shooting in midtown Manhattan. The victim, a prominent businessman and a gunman on the loose.
Jeff Alter
I was still on the train and I was getting texts from former colleagues at first just saying, I can't believe what happened to Brian. My first inclination was, did he get sick? Did he get fired?
Lester Holt
Then he read the headlines, just devastated,
Jeff Alter
you know, I thought he was in the wrong place at the wrong time, maybe got mugged or something like that.
Lester Holt
But police quickly had a different take.
Lester Holt (interviewer)
Was your initial hunch targeted?
Detective Sergeant John Griffin
Yeah, 100%.
Lester Holt
Detective Sergeant John Griffin, now retired, was the senior Sergeant of the NYPD's Major Case Squad at the time. This is his first interview about the investigation. He says the NYPD accessed that security video of the murder almost immediately, and it told a story.
Detective Sergeant John Griffin
We stepped out from behind the suv, knew exactly what he was doing, there was no hesitation. Looked like he was waiting for the victim.
Lester Holt (interviewer)
This wasn't a mugging that led to a shooting.
Detective Sergeant John Griffin
No, but it is very similar to a lot of narcotics related homicides that we've dealt with.
Lester Holt (interviewer)
Which can be targeted.
Detective Sergeant John Griffin
Absolutely. This is in the NYPD's wheelhouse. This is what we do.
Detective Joe Mitsopoulos
You have a crime scene unit that comes out. They have to take photos of everything. They have to block things off.
Lester Holt
Retired NYPD Detective Joe Mitsopoulos was on the team that worked the case, trying to figure out who would target the 50 year old father of two from Minnesota.
Detective Joe Mitsopoulos
You start widening your canvas, and a canvas is basically checking the area for evidence. You know, evidence would be shell casings, they would be cameras, there'd be witnesses, that kind of stuff.
Lester Holt
That initial canvas made clear that the murderer, Brian Thompson, had nothing to do with his personal life. The motive was right here on the sidewalk. Two spent bullet shells, a third unfired round, each inscribed with a different word. Delay, depose, deny.
Lorena O'Neill
I was like, whoa, okay. It's not just a shooting on the street.
Lester Holt
Lorena o' Neal is a contributing writer at Rolling Stone. She has been reporting on the case from the beginning, starting with the story told by those three words, which are
Lorena O'Neill
words that are commonly used to criticize how the health insurance industry handles claims.
Lester Holt (interviewer)
It's suggesting the pattern that they typically take.
Lorena O'Neill
Right.
Lester Holt
It was the first important clue for investigators.
Detective Sergeant John Griffin
It definitely meant it was targeted. It definitely meant that it probably had some sort of a relation to the health care system.
Lester Holt
The murder instantly transformed into something much bigger. A national venting of anger and frustration over the health care system.
Lorena O'Neill
This was a man. This was a father of two. But in the discourse, he's being dehumanized. I think what ended up happening is the victim became the villain. He has become a symbol, as did Luigi Mangione.
Lester Holt
Tonight we have new insights into the two men at the center of it all.
Jeff Alter
He was very proud of where he came from. Very humble.
Christian Sacchini
I really think that the Luigi I met that night was still a normal person that wouldn't be capable of what he's accused of.
Sam Beard
I think millions of people see some of themselves in Mangione and that's why they love him so much.
Lester Holt
Will take an exclusive look inside the manhunt.
Detective Sergeant John Griffin
Sometimes the best thing to do is go backwards.
Lester Holt (interviewer)
You were following a trail, but the opposite direction.
Detective Sergeant John Griffin
Right.
Lester Holt
And try to answer the central question. What might have set the collision course of these two men in motion?
Dorian Wright
That's the million dollar question. Right.
Lester Holt
United Healthcare CE Brian Thompson had been gunned down on the street in Manhattan. And now the NYPD was hunting for a killer.
Lester Holt (interviewer)
What did you fear that might happen if you didn't get the shooter in custody quickly?
Detective Sergeant John Griffin
A lot of people thought that there might be more to come.
Lester Holt
And almost immediately it was clear this was no normal murder case. Online sympathy was not with the victim.
News Reporter
Of course, people have no sympathy for the CEO of UnitedHealthcare.
DSW Narrator
They're tired of CEOs making millions of dollars while their family members are not being taken care of properly.
Lester Holt
I don't think anyone should feel bad about this.
Jeff Alter
Social media is fast and cruel. People posting smiley faces that somebody was murdered, just. It's just beyond me.
Lester Holt (interviewer)
Cruel is the word you used.
Jeff Alter
Really?
Lester Holt (interviewer)
Cruel, yeah.
Jeff Alter
Particularly for people who knew Brian.
Lester Holt
Jeff Alter is the first person in Brian Thompson's inner circle to speak publicly about the case. He wants people to know more about the man he got to know over some 20 years. A man who rose to corporate CEO
Lester Holt (interviewer)
from small town kid, Iowa farm boy. Was that something he wore as a badge of honor?
Jeff Alter
Yes. He was very proud of where he came from. Very humble. Particularly proud of his father, a hard working farmer who even at the end of a long tough day, gave back to his town.
Lester Holt
Brian was valedictorian in high school and at the University of Iowa where he studied business administration and accounting on a full scholarship. He married his high school sweetheart, joined a prestigious corporate accounting firm in Minneapolis, and The couple had two boys. In 2004, he moved over to United Health Care, also in Minnesota, Iowa, still tugging at his sleeve.
Lester Holt (interviewer)
He wanted to be all things for all people.
Jeff Alter
I think he thought that this was a wonderful opportunity for him to better the life of his children. And he'd ask me, is he doing the right thing for his children? Should they move back?
Lester Holt
But Brian was on a fast track to the top.
Lester Holt (interviewer)
Was he the kind of guy that people looked at and said, he's going to be CEO someday?
Jeff Alter
We'd all say, yeah, he could be.
Lester Holt
Brian did become CEO of UnitedHealthcare in 2021.
Lorena O'Neill
Hi, I'm Brian Thompson.
Lester Holt
Here he is making a presentation at a health care leadership forum.
Detective Sergeant John Griffin
Our mission and values are focused on helping people live healthier lives and making the health system work better for everyone behind me.
Lester Holt
In just two years as CEO, he aggressively expanded the company, the biggest health insurer in the country, covering nearly 50 million people. Even as the company faced criticism for patient coverage, profits rose more than 30% to over $16 billion.
Detective Sergeant John Griffin
We're thrilled to be the presenting sponsors.
Lester Holt
Brian also engaged in philanthropy and was named an honorary co chair of the Special Olympics.
Jeff Alter
He was beyond just being a super smart, driven person. He was a great person to be around.
Lester Holt
The investors conference was another chance to boost the company. But Brian didn't make it there. And now his killer was on the run.
Lester Holt (interviewer)
Were you afraid you had lost him at that point?
Detective Sergeant John Griffin
No, we just hadn't found him. He's there. We're gonna find something.
Lester Holt
Investigators studied clues from the scene. Those inscribed cartridges and that CCTV video of the murder.
Lester Holt (interviewer)
What do you know about the weapon that he used?
Detective Sergeant John Griffin
We could tell right away that it was some sort of of a semiautomatic. It had something on the front, either like a homemade suppressor or silencer type of thing.
Lester Holt (interviewer)
Is that a common thing that you uncover, people with silencers?
Detective Joe Mitsopoulos
No.
Detective Sergeant John Griffin
25 years. I don't think I've ever actually encountered a silencer before.
Lester Holt
That from the get go tips flooded in. Major Case Squad Detective Joe Metzopoulos ran down some of the 300 plus leads.
Detective Joe Mitsopoulos
They varied in hey, that's my next door neighbor or this person has a vendetta against the the health care system. We had tons of those.
Detective Sergeant John Griffin
The FBI helped out with a lot of the out of state tips because we were getting tips from all over the country.
Lester Holt (interviewer)
Do you remember any in particular that stood out to you?
Detective Sergeant John Griffin
There's one that I remember where it was a family's young child had died waiting for authorization for some sort of treatment. Others where a spouse had passed away and treatment was either denied or deemed not necessary. They were horrible to read.
Lester Holt (interviewer)
These people were fingering someone who they thought had a big enough of a grudge usually to commit violence.
Detective Sergeant John Griffin
Yeah, when they were legitimate tips, you had to make sure that that person wasn't here in New York when this happened.
Lester Holt
Those tips didn't lead anywhere, but something else did.
Detective Sergeant John Griffin
You can't be on guard 24 7. There's going to be little slip ups,
Lester Holt (interviewer)
but that's what you count on is the slip up.
Detective Sergeant John Griffin
Exactly.
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Lester Holt
For detectives trying to track down Brian Thompson's killer, their most powerful investigative tool was practically staring them in the face inside taxi cabs, trains, buses and on the streets.
Lester Holt (interviewer)
So we're actually not far from the
Lester Holt
shooting, but we're at a different intersection
Lester Holt (interviewer)
in Manhattan right now.
Lester Holt
We're Being observed all over us everywhere. Cameras.
Detective Sergeant John Griffin
Yep.
Lester Holt
John Griffin took us onto Manhattan streets and showed us how the NYPD built a video timeline of the manhunt.
Lester Holt (interviewer)
So that's controlled by the New York City police.
Lester Holt
Correct.
Detective John Griffin (explaining cameras)
And any detective can get that from their desk. So if something happens here, the case detectives gonna look at that camera from his desk and figure out where you went. And then they're gonna go back and they're gonna find all these buildings down here, down here that have video. And where they lose you, they're gonna go to those videos and try to pick you up, and they're just gonna keep going.
Lester Holt (interviewer)
So you keep laying in the pizzas,
Detective John Griffin (explaining cameras)
it's gonna keep going forward, forward, forward. And there's almost nowhere to hide in the city, Lester.
Detective Joe Mitsopoulos
I remember us reviewing tons of the cameras that are always on the corners like that, Just following, you know, for a little bit of a second of all it captured. And then it led to another block and then to another block.
Lester Holt
As investigators search for the shooter, they did something that sounds counterintuitive.
Detective Sergeant John Griffin
Most people want to look forward. Where did the guy go? How did he get away? Let's find him. For an investigation, sometimes the best thing to do is go backwards.
Lester Holt (interviewer)
So you were following a trail, but the opposite direction.
Detective Sergeant John Griffin
Right. For the days before the murder, somebody commits a crime and they just want to get out of there, and they'll do whatever they can not to be tracked. Sometimes the 12 hours before that, they may not be thinking about the crime. And you can't be on guard 24, seven. There's going to be little slip ups,
Lester Holt (interviewer)
but that's what you count on is the slip up.
Detective Sergeant John Griffin
Exactly.
Lester Holt
Here is the shooter before the murder, emerging from a subway station and pacing what would become the crime scene. Investigators tracked him backwards, camera by camera to a Starbucks and to a hostel on Manhattan's Upper west side. And that's where the slip up happened. A camera captured an image of the suspect with his mask lowered, exposing his face.
Detective Joe Mitsopoulos
That was the one where he was smiling. That's when we were like, oh, we got something here to run with.
Dorian Wright
Authorities say these clear photos are of a person of interest taken at the hostel.
Lester Holt
They also got a name. The suspect had checked into the hostel as Mark Rosario to find this Mark Rosario. Now they went back to a daisy chain of video clips taken after the murder, tracking his escape.
Detective Sergeant John Griffin
There was some really good, interesting video of him as he left the scene. And then the bike up north into Central Park.
Lester Holt
Cameras don't capture the whole of Central Park. About two And a half miles long. But experienced investigators soon picked up the trail.
Detective Sergeant John Griffin
Eventually tracked him up into northern Manhattan.
Lester Holt (interviewer)
So he abandons the bike at some point.
Detective Sergeant John Griffin
Yeah. The last place that we had video of him was up near the Port authority bus terminal by the GW Bridge.
Detective Joe Mitsopoulos
Then it was like, all right, well, what are we going to do now? Where do we get to the end bin? That's where we wanted.
Lester Holt
But his trail went cold. Days ticked by, and online, his support was growing. Growing activists set up a legal defense fund for the unnamed suspect.
Lester Holt (interviewer)
When did you first become aware that this figure was becoming something of a folk hero?
Detective Sergeant John Griffin
There was some talk of that from right in the beginning.
Lester Holt (interviewer)
How did you react to it, though, that people would think of him as a do gooder as opposed to a murder suspect?
Detective Sergeant John Griffin
It didn't sit well. NYPD detectives routinely look at people that die, either from homicides or accidents on the street, and you see the fragility of life. You cannot sanctify somebody who does this and make them a hero.
Lester Holt
Five days after the murder, Brian Thompson's family and friends gathered under heavy guard at a church in Minnesota. It was a private invitation only funeral. Jeff Alter couldn't be there, but says his heart broke for Brian's family.
Jeff Alter
His wife, his children, his mother, who had just lost her husband not too long before that. Now she's losing one of her sons.
Lester Holt
The law enforcement presence included a sniper on the roof, A recognition of the public sentiment surrounding Brian's murder. It was also a reminder that the suspect was still out there, but not for long.
911 Operator / Police Dispatcher
He looks like the CEO shooter from New York.
Lester Holt
An arrest was coming along with a fascination about how this young man ended up accused of murder.
Dorian Wright
So he walked in the door and all of a sudden, all the girls, like, you know, turned their head, looked at him like, who's this new gu?
Lester Holt
While Brian Thompson's family was laying him to rest on that same day, 1,000 miles away.
911 Operator / Police Dispatcher
Number one, what is the address of your emergency?
Lester Holt
The manager of a McDonald's in Altoona, Pennsylvania, called 91 1.
911 Operator / Police Dispatcher
It's not really an emergency. I have a customer here that some other customers were suspicious of.
Lester Holt
A young man was eating breakfast alone.
911 Operator / Police Dispatcher
He looks like the CEO shooter from New York.
Lester Holt
A patrol unit arrived. Two officers approached with body cams rolling. Yes. Someone called.
Jeff Alter
They thought you were suspicious.
Lester Holt
Oh, I'm sorry.
Detective John Griffin (explaining cameras)
Yes.
Lester Holt
One officer took the ID and stepped away to call it in.
Detective Joe Mitsopoulos
He's got a driver's license that says Rosario. And I'm like, new Jersey driver's license.
Lester Holt
The name on the ID matched the name of the man who dropped his mask at that Manhattan hostel. But officers on the scene suspected it was a fake ID and pressed him for his real name, which he told them. Luigi Mangione. He was arrested and extradited to New York. The spectacle of his arrival by helicopter, escorted by the mayor and a phalanx of law enforcement only intensifying the public's infatuation.
Jeff Alter
Free Luigi and his beautiful eyebrows.
Lorena O'Neill
They didn't know that America was gonna be rooting for the assassin. Right?
Lester Holt
You're gonna give the people what they want, right?
Jeff Alter
I try, but I cannot understand how this person is seen as a hero. I try not to, but I lose some faith in humanity.
Lester Holt (interviewer)
We have all been trying to figure out who Luigi Mangione really is. Are you getting any closer?
Lorena O'Neill
I've been working on it for about a year and I still don't know that I have everything.
Lester Holt
Lorena O' Neill has interviewed more than 30 sources, family members, friends and law enforcement trying to untangle Mangione's life. And she shared her reporting with us.
Lorena O'Neill
From everything that I've heard about him from his friends and family, he was just a friendly guy who didn't stand out as controversial or troubled or anything like that.
Lester Holt (interviewer)
He wasn't the stereotypical. Oh, he was quiet and kept to himself. He engaged people.
Lorena O'Neill
No, he wasn't an outsider. He was social. He had friends.
Lester Holt
She learned that unlike Brian Thompson, Mangione was born into a life of wealth and privilege. His family owned businesses, including a country club, assisted living facilities, and a radio station. Mangione was raised in suburban Baltimore, the youngest of three.
Lorena O'Neill
The teachers I spoke with at Gilman were saying we always thought he'd end up making some scientific discovery or some technological advance for society.
Lester Holt (interviewer)
You mentioned Gilman. This is a LEED high school, very elite high school.
Lorena O'Neill
Within the people that went to Gilman, he was known to be amongst the smartest.
Lester Holt
And Mangione had something in common with Brian Thompson.
Lorena O'Neill
He was valedictorian of his class.
Detective Joe Mitsopoulos
It's been an incredible journey, and I simply can't imagine the last few years with any other group of guys.
Christian Sacchini
Thank you.
Lester Holt
Mangione got an Ivy League education in computer science and engineering. In 2022, he relocated to Hawaii, moving in with a techie co living community called Surfbreak, and worked as a data engineer for an online car marketplace.
Lorena O'Neill
He was working remotely. By all accounts, he was a very outdoorsy person and he enjoyed the lifestyle in Hawaii that he could have as a community of digital nomads.
Lester Holt
He spilled his life out online under the Mr. Cactus Reddit hand, widely believed to be his. There were posts about gaming and travel and about his health.
Lester Holt (interviewer)
He was also at the time suffering with some kind of back ailment.
Lorena O'Neill
Yes, he had been complaining of back problems ever since he was in middle school. And it seemed to get worse when he was in Hawaii.
Lester Holt
This post said it went bad to the point where I felt it every day.
Dorian Wright
I trained in India. I trained in a little yoga therapy. I'm good at dealing with people with injuries.
Lester Holt
Dorian Wright teaches yoga in Honolulu.
Dorian Wright
I remember when Luigi came in because he's a good looking guy. So he walked in the door and all of a sudden all the girls, like, you know, turned their head, looked at him like, who's this new guy? He said, hey, my name's Luigi. I said, oh, nice to meet you. I'll take care of you.
Lester Holt (interviewer)
You know, he's such a mystery to so many people. What was your impression?
Dorian Wright
Just a normal guy, like a normal young, happy, you know, had a great smile. Nothing out of the ordinary.
Lester Holt (interviewer)
Was he making friends?
Dorian Wright
Yeah, I heard he made a lot of friends. I know he was on Tinder because he matched up with one of our yoga teachers.
Lester Holt
Dorian says he worked with Mangione off and on for about a year.
Lester Holt (interviewer)
How was his back? Was he improving?
Dorian Wright
Definitely. Yeah, he felt great. He said he felt way better after he did a class with me.
Lester Holt
But as helpful as the yoga was, Mangioni's back problems didn't go away. In the summer of 2023, he quit his job and traveled home for surgery to fuse two vertebrae, posting x ray images of spinal scaffolding. The surgery seemed to be a success. A post said a week later he was on literally zero pain meds and was able to sit, walk and stand for as long as he wanted.
Lester Holt (interviewer)
Did he ever, in your presence, mention health care?
Dorian Wright
No, he never mentioned health care.
Lester Holt (interviewer)
The topic of health care doesn't seem to add up.
Dorian Wright
No, because he came from a wealthy family and I also heard like, he was able to pay his health bills. So it doesn't make sense.
Lester Holt (interviewer)
What's his political ideology?
Lorena O'Neill
His family, I would say, leaned conservative. As far as Mangione, he. His political views were a little bit more all over the map. I would say he seems to be more of a centrist and he seemed to, from some people that I've spoken with, be a fan of RFK Jr.
Lester Holt
While in Hawaii, Mangione also helped start a book club.
Lorena O'Neill
Mangione is an avid reader. He analyzes the books that he reads. He talks about them a lot.
Lester Holt
One of the books taken up by the club was the Unabomber, Ted Kaczynski's manifesto, a provocative text challenging our corporate industrial society.
Lorena O'Neill
There were some initial reports that the book club was disbanded after they read the Unabomber's manifesto. And what my reporting has shown is, no, it just kind of faded away. It wasn't like this big fight at the book club. One of the book club members I spoke with said, honestly, it was just an excuse to watch the sunset.
Lester Holt (interviewer)
This story seems to really confirm the same frustration that we keep hearing over and over again, trying to find something that at least helps us understand who he is as a suspect and potentially a killer.
Lorena O'Neill
Right. And I think that people can go back into his life and say, okay, it was this, it was the back pain, it was Ted Kaczynski. I have found that people sort of use him as a Rorschach test for what they feel like is happening in the world.
Lester Holt
If what was happening in Mangione's mind is a mystery, maybe these handwritten notes hold a clue.
Luigi Mangione (writings/notes)
He says it had to be done. Frankly, these parasites simply had it coming.
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Lester Holt
In early 20. In 2024, the investors conference that would bring Brian Thompson to New York was many months away. Halfway around the world, Luigi Mangione decided to go from digital Nomad to just Nomad.
Lorena O'Neill
He had told a friend he wanted to get away for a little bit. He was in Japan, he was in Thailand and he was in India.
Christian Sacchini
He said he was just traveling.
Lester Holt
Christian Sacchini is a pro soccer player in Thailand. In mid 2024, he was with a friend in a bar in Bangkok when Mangioni heard them speaking English and struck up a conversation.
Christian Sacchini
My initial impression was that he's just a backpacker going through Asia.
Lester Holt
As they chattered over beers that evening, he says they touched on computer games, the volcanoes in Hawaii and healthcare in Thailand.
Christian Sacchini
I told him a story about how I went to the hospital to get an MRI and X ray and I had zero insurance and after I go get the bill, it was about $180 and he couldn't believe it. So that's what kind of sparked the conversation about health insurance in the U.S.
Lester Holt
he says Mangione had opinions about America's for profit system.
Christian Sacchini
The way he spoke about the healthcare system is the same way. Anyone I meet that's living abroad speaks about it honestly, including myself. The health care system in the US is different than other countries in a not a good way. Nothing he said seemed angry or resentful.
Lester Holt
From Thailand, Mangione went to Japan, where he told an acquaintance he wanted to Zen out. He ventured to the remote mountainous Nara region, popular with people seeking spiritual enlightenment and solitude.
Lester Holt (interviewer)
So he's in Asia. He's not as communicative as he had been.
Lester Holt
What was he doing?
Lorena O'Neill
He was reaching out to bloggers and authors who spoke about political tribalism, asking how can we build community, how can we create more discourse, how can we connect?
Lester Holt (interviewer)
Would it be overstatement to say he was becoming a bit of an activist?
Lorena O'Neill
I don't know if I would say activist, but I do think he was perhaps seeking a solution to a problem that he saw.
Dorian Wright
Now I've heard all kinds of theories like, you know, he's in Thailand, he got radicalized, all these things. I mean, I have no idea.
Lester Holt (interviewer)
Everyone's talking about it though.
Dorian Wright
Everybody. That's the million dollar question, right?
Lester Holt
In August, the 26 year old Mangione flew back to Hawaii, packed up his life there and made his way to San Francisco.
Lorena O'Neill
That is the time when he started to go more dark.
Lester Holt (interviewer)
When you say go dark, you mean in terms of his ideologies or dark
Lorena O'Neill
in terms of we haven't heard from him go dark. In terms of we haven't really heard from him. He does make a bank withdrawal in San Francisco in August. And then after the end of August, we do not know where he is. Some of his friends have told me that his family was reaching out to them in the fall, saying, have you heard from Luigi? We've lost touch with him. We don't know where he is. His mother files a missing persons report in November.
Lester Holt
Some clues to what Mangione might have been doing in those months come from this red notebook that police found in his backpack when he was arrested. It contains dated, handwritten entries.
Lester Holt (interviewer)
What are some of the things in here that you think may represent major flags?
Lorena O'Neill
I think it's interesting to look at
Luigi Mangione (writings/notes)
this excerpt from August 15th that says the details are finally coming together. I don't feel any doubt about whether it's right or justified. I'm glad in a way that I procrastinated because it allowed me to learn more about UHC. So this is where we see UHC specifically named.
Lester Holt
Around the time of Mangione's writings, UnitedHealthcare faced a wave of negative publicity. Criticized for high claim denials while profits were increasing. The company tells Dateline its rate of denials is substantially lower than what's been reported. Mangione doesn't specify what he learned about United Healthcare, but prosecutors say the writings reference the company's upcoming investors conference.
Luigi Mangione (writings/notes)
He says, what do you do? You whack the CEO at the annual parasitic bean counter convention. It's targeted, precise, and doesn't risk innocence. Most importantly, the point becomes self evident.
Lester Holt (interviewer)
It's pretty chilling.
Lorena O'Neill
It is.
Lester Holt
A few weeks later, CEO Brian Thompson was murdered and Mangioni was under arrest.
Dorian Wright
I mean, I was shocked. I was like, he didn't seem like kind of guy would do something like that.
Christian Sacchini
The Luigi I met that night was still a normal person that wouldn't be capable of what he's accused of. There is eight months to where the murder happened, so I don't know what happened after.
Lester Holt
How Luigi Mangione might have changed from regular guy to what prosecutors describe as a brazen killer is a question Mangione himself seemed to anticipate in his backpack. Along with the entries from the red notebook, investigators found additional writings, including a note addressed to them.
Lester Holt (interviewer)
Okay, this is the letter to the feds.
Lorena O'Neill
Yes.
Lester Holt
The note to the feds contains what prosecutors describe as a confession to the FBI. Mangione writes, to save you a lengthy investigation, I state plainly, I wasn't working with anyone.
Luigi Mangione (writings/notes)
He says, it had to be done. Frankly, These parasites simply had it coming. And he said, evidently I'm the first to face it with such brutal honesty.
Lester Holt
Other notes found in the backpack appear to show he was thinking about ways to elude authorities.
Lester Holt (interviewer)
Some of these writings also could be interpreted as a checklist, kind of a things to do.
Luigi Mangione (writings/notes)
Yes, I believe there was one that
Lorena O'Neill
says pluck eyebrows and buy trash bags. He also talks about breaking camera continuity. And he says, keep momentum efficient, slower overnight.
Luigi Mangione (writings/notes)
He talks about changing his shoes. He talks about getting a hot meal. He talks about buying batteries.
Lester Holt
Mangione also writes about the Unabomber, Ted Kaczynski.
Luigi Mangione (writings/notes)
If you're too violent, if you're seen as a terrorist, the message will be dismissed. And so he seems to be grappling with how do I get a message across?
Lester Holt
UnitedHealthcare says Mangione was never in insured by the company and there's nothing in his writings that mentions Brian Thompson by name. The writings do suggest he considered other options before prosecutors say he targeted the health care CEO.
Luigi Mangione (writings/notes)
He does refer to KMD or rmd
Lorena O'Neill
would have been an unjustified catastrophe. And talks about.
Lester Holt (interviewer)
Is he talking about a person or a company?
Lorena O'Neill
I really don't know.
Luigi Mangione (writings/notes)
But what's clear from this is he says the target is insurance. It checks every box.
Lester Holt
Mangione will face a jury of his peers later this year, but there are those who believe he is not the one who should be on trial.
Lester Holt (interviewer)
This should be two conversations, the state of the health care industry. But the murder of an innocent man should be its own conversation.
Sam Beard
I think tens of millions of Americans don't find Brian Thompson or his ilk to be innocent of anything.
Lester Holt
Luigi Mangione is awaiting trial for federal stalking charges and state murder charges for the killing of Brian Thompson. He pleaded not guilty to all of them and has spent the last year and a half in a detention center in Brooklyn where his attorneys say he has been inundated with mail, his support coming from all over the world.
Sam Beard
I think millions of people see some of themselves in Mangione and that's why they love him so much.
Lester Holt (interviewer)
But he. He was accused of murder.
Sam Beard
Millions of Americans wouldn't call it a murder. They would call it something else entirely.
Lester Holt
Sam Beard, a health care activist and co host of the Party Girls podcast, helped establish that legal defense fund for Brian Thompson's killer before Mangione was arrested. The fund now sits at more than one and a half million dollars.
Sam Beard
Americans are disgusted with the way that these parasitic health insurance corporations have inserted themselves between everybody that they love and their Path to wellness.
Lester Holt (interviewer)
This feels like this should be two conversations, like the conversation you're having right now about the state of the healthcare industry, but that the murder of an innocent man walking down the street should be its own conversation.
Sam Beard
I think tens of millions of Americans don't find Brian Thompson or his ilk to be innocent of anything.
Lester Holt (interviewer)
Do you think that he deserved to be murdered on the street?
Sam Beard
You know, when, when once, you know, he was at the helm of the largest private health insurance corporation that the world had ever seen.
Lester Holt (interviewer)
But did that make him worthy of being murdered?
Sam Beard
I don't think that I can answer that question. But millions of people around the country seemed to feel that way.
Lester Holt (interviewer)
It's interesting how so many conversations about Mangioni end up in a place where, well, I don't justify killing, I don't support anybody killing, but it's that but that.
Lorena O'Neill
But you hear all of the time when I'm speaking to people, they will say, of course I don't condone violence, I am against murder, but I can understand why somebody would be upset at the healthcare insurance industry. And that but is what fueled the discourse after Brian Thompson's murder.
Lester Holt (interviewer)
Have you been at all surprised by the level of frustration that this is uncorked?
Dr. Elizabeth Rosenthal
No, because I hear the frustration every day in my job.
Lester Holt
Dr. Elizabeth Rosenthal is a best selling author and journalist who has written about the American health care industry for 30 years. She's currently the senior contributing editor at KFF Health News, a national nonprofit news organization focused on health care. She is also mentioned by name in Luigi Mangione's writings as someone who has illuminated the corruption and greed of the health care system.
Lester Holt (interviewer)
To be clear, you don't consider yourself an ally of him?
Dr. Elizabeth Rosenthal
No, no, no, of course not. He could mention me. He could mention a lot of other people who've written about this.
Lester Holt (interviewer)
You have said the system isn't broken, that it's actually acting as it was designed.
Lester Holt
What do you mean by that?
Dr. Elizabeth Rosenthal
Well, our health care system has in my lifetime changed from a system that was, was devoted to caring to a system that's devoted to profit and to maintaining itself. These are big businesses and that's what matters the most.
Lester Holt
And she says that by many measures our for profit system is failing patients.
Dr. Elizabeth Rosenthal
Everyone wants to blame someone or one part of the system, and it's not any one part. It's like a circular firing spot.
Jeff Alter
We knew we disappointed people and we knew probably a lot of times we were unfairly criticized for the role that unfortunately our U.S. health care system puts
Lester Holt (interviewer)
the big payers in despite the criticism of their industry.
Lester Holt
Jeff says that among his colleagues, Brian Thompson had a reputation as a caring and conscientious executive.
Jeff Alter
He was always very mindful that at the end of everything that we did was a person and that person needed us to be at our best. And he would demand that of people.
Lester Holt (interviewer)
You knew you were in an industry that was not liked by some, but you couldn't have imagined that someone would kill over that.
Jeff Alter
It's still beyond me that people who clearly have hate in their hearts would take somebody's life over what they did for a living.
Lester Holt
Mangione's murder trial is scheduled to begin in New York York this September.
Laura Jarrett
Any good defense lawyer would try to keep out as much evidence as they can.
Lester Holt
Laura Jarrett is senior legal correspondent for NBC News. She says that in addition to Mangione's notes, which some have called a manifesto, police also found a partially 3D printed handgun and a silencer in his backpack. His defense has argued that the backpack search was unlawful.
Laura Jarrett
But here the buck stopped with the judge who said no. The alleged murder weapon, that gets to come in the alleged manifesto where he talks about the insurance industry, that now gets to come in.
Lester Holt
Mangione's defense attorneys did not answer our questions about the case and told Dateline they're concerned about pre trial publicity, including public statements made by the NYPD that they say threatens their client's ability to get a fair trial. Laura Jarrett says in court the defense may try to shift the jury's attention to the health insurance industry.
Laura Jarrett
The defense benefits enormously if the judge allows them to make this about putting the insurance industry on trial instead of Luigi Mangione. Now prosecutors are gonna fight hard, but the industry really is the backdrop to all of it. It's why you have people lined up outside of that courthouse. People are dying because, remember, as jurors and potential jurors are walking into that courthouse, they're going to hear the chants,
911 Operator / Police Dispatcher
healthcare is a human right.
Laura Jarrett
They're going to see the signs. They're supposed to disregard it. But the questions about the insurance industry has raised the stakes in a way I think we haven't seen in a long time.
Lester Holt (interviewer)
Is this trial going to be about murder or the ethics of the health care system?
Sam Beard
The only people who know the answer to that question are Luigi, his defense team and the prosecutors. I think for the average American, though, the health care system was immediately put on trial that day.
Lester Holt
While that's a deliberation with no end in sight, a jury inside a Manhattan courtroom will soon decide Luigi Mangione's fate. We may never know if it was rage, frustration, misguided idealism, or something else altogether that led to the deadly confrontation on that December morning. But for those who cared for Brian Thompson, the reason for his death matters far less than remembering the life he led.
Lester Holt (interviewer)
He's the victim.
Jeff Alter
Yes. Yeah. We can never forget that. He was a great father, great husband, great son, a wonderful person.
Lester Holt
That's all for this edition of dateline. And check out our talking DATELINE podcast. Andrea Canning and I will go behind the scenes of tonight's episode, available Wednesday in the DATELINE feed. Wherever you get your podcasts, we'll see you again next Friday at 10, 9 Central. I'm Lester Holt. For all of us at NBC News, good night.
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Episode Air Date: June 9, 2026
Host: Lester Holt
Main Theme:
A gripping exploration of the targeted murder of UnitedHealthcare CEO Brian Thompson in Manhattan, the subsequent manhunt for suspect Luigi Mangione, and how the crime has sparked controversy, fascination, and debate over the ethics of America's healthcare system. The episode balances intense investigative storytelling with reflections on public outrage, divisive social media discourse, and the personal histories of both the victim and the accused.
This Dateline episode investigates the December 2024 murder of Brian Thompson, CEO of UnitedHealthcare, shot while arriving at a Manhattan hotel for a major corporate event. What begins as a straightforward homicide case quickly evolves into a national touchpoint of rage against the healthcare industry as the suspect, Luigi Mangione, becomes a polarizing folk hero to some. The episode carefully reconstructs the murder, the ensuing NYPD investigation, the unraveling of Mangione’s identity and motives, and the broader societal implications of the crime.
"He stepped out from behind the SUV, knew exactly what he was doing. There was no hesitation."
– Detective Sgt. John Griffin [01:02, 05:10]
“It’s targeted, precise, and doesn’t risk innocents. Most importantly, the point becomes self-evident.”
– Luigi Mangione’s writings [33:26]
“Online sympathy was not with the victim.”
– Lester Holt [08:34]
“Social media is fast and cruel… people posting smiley faces that somebody was murdered.”
– Jeff Alter [08:53]
“Millions of Americans wouldn’t call it a murder. They would call it something else entirely.”
– Sam Beard [37:22]
“The defense benefits enormously if the judge allows them to make this about putting the insurance industry on trial instead of Luigi Mangione.”
– Laura Jarrett [42:35]
“Our health care system has, in my lifetime, changed from a system that was devoted to caring to a system that’s devoted to profit and to maintaining itself."
– Dr. Elizabeth Rosenthal [40:03]
Dateline’s signature style: a measured, investigative tone balancing empathy, fact-finding, and social commentary. Sources’ voices are respected, with Lester Holt’s narration guiding listeners through emotional nuance, legal complexity, and underlying societal tensions.
This Dateline NBC episode is a meticulously reported, deeply human true-crime story with profound national implications. The targeted murder of Brian Thompson catalyzes a wider reckoning with the US healthcare system—its perceived failings and the intense emotions they provoke. Luigi Mangione’s transformation from privileged, well-liked tech worker to alleged killer is portrayed as both chilling and enigmatic, prompting reflection on mental health, ideology, and the dangers of turning frustration into violence.
Through interviews, investigation, and Mangione’s own writings, the episode illustrates how one act of violence became a symbolic battlefront—a Rorschach test—for American anger, activism, and the blurred lines between justice, vengeance, and social change.
This summary provides a comprehensive outline of "A Killing in Midtown," illuminating the intricate narrative, major developments, key quotes, and broader cultural questions raised by the episode.