19w ago / 4:27 PM EST

Investigators look into whether Mangione posted about the Unabomber

Investigators say they are aware of online posts that Mangione may have created about Ted Kaczynski, the domestic terrorist known as the Unabomber.

Investigators say they are scouring all of Mangione's online posts, including posts on Goodreads that mention the Unabomber. Investigators will see whether they can glean any clues from the posts or whether they help them know more about Mangione, whom authorities have called a "strong person of interest" in the killing of UnitedHealthcare CEO Brian Thompson.

Kaczynski was an anti-technology recluse who killed three people with mail bombs from 1978 to 1995.

19w ago / 3:56 PM EST

Luigi Mangione has multiple degrees from the University of Pennsylvania

Mangione received multiple science engineering degrees at the University of Pennsylvania.

Mangione received a BS in engineering in May 2020 and a master of science engineering degree at the Ivy League school at the same time, it said.

His core studies centered on computer science and math, the university said.

19w ago / 3:32 PM EST

UnitedHealth Group says it hopes arrest brings relief to Brian Thompson's loved ones

UnitedHealth Group, owner of UnitedHealthcare, said in a statement it hopes the arrest brings relief to those affected by the "unspeakable tragedy."

“Our hope is that today’s apprehension brings some relief to Brian’s family, friends, colleagues and the many others affected by this unspeakable tragedy," the statement said, referring to Brian Thompson, who was shot and killed last week. "We thank law enforcement, and we will continue to work with them on this investigation. We ask that everyone respect the family’s privacy as they mourn.”

19w ago / 2:51 PM EST

Photos of the gun found on Luigi Mangione

Below is a photo of the gun found on Luigi Mangione in Altoona, Pennsylvania, today.

A senior law enforcement official said it appears to be similar to the weapon used in the murder of Thompson.

The gun found on Luigi Mangione in Altoona, Pa.Provided to NBC News
19w ago / 2:16 PM EST

Mangione wasn't known to NYPD before today

NYPD Chief of Detectives Joseph Kenny said Mangione was born and raised in Maryland and has ties to San Francisco, with a last known address in Honolulu. 

Police believe he attended college in Pennsylvania. 

Kenny said that police did not have his name before today and that he has no known previous arrests in the country. 

“At some point, we’ll work out through extradition to bring him back to New York to face charges here, working with the Manhattan district attorney’s office,” Kenny said.

19w ago / 2:00 PM EST

N.Y. mayor: ‘Strong person of interest’ identified in CEO shooter manhunt

NBC News

New York Mayor Eric Adams announced that a “strong person of interest” has been identified in the manhunt for the suspected shooter. Adams said the man is in possession of several items that officials believe will “connect him” to the shooting.

19w ago / 1:54 PM EST

Man being questioned by police had weapon on him, and handwritten document about 'his motivation'

Mangione was found with a ghost gun and a suppressor “both consistent with the weapon used in the murder,” New York City Police Commissioner Jessica Tisch said.

Officers also recovered a handwritten three-page document “that speaks to both his motivation and mindset,” she said. Officials did not elaborate on the contents of the document.

Chief of Detectives Joseph Kenny said the Altoona Police Department has the document. 

“Just from briefly speaking with them … it does seem that he has some ill will toward corporate America,” he said. 

Mangione was in a McDonald's earlier today in Altoona and was recognized by an employee who called police. Officers described him as “acting suspiciously” and as carrying multiple fraudulent IDs, as well as a U.S. passport, Tisch said.

Police also recovered clothing, including a mask consistent with the masks worn by the shooting suspect. Police recovered a fraudulent New Jersey ID matching the ID the shooting suspect used to check into a New York City hostel before Thompson was shot. 

New York City police detectives are on their way to Pennsylvania to interview Mangione. 

19w ago / 1:46 PM EST

Person of interest arrested on firearm charges in Pennsylvania, NYPD says

New York City Police Commissioner Jessica Tisch announced that Luigi Mangione, 26, had been arrested on firearm charges in Altoona, Pennsylvania. 

“At this time, he is believed to be our person of interest in the brazen targeted murder of Brian Thompson, CEO of UnitedHealthcare, last Wednesday in midtown Manhattan,” she said at a previously scheduled news conference about a separate matter.

Mangione has not been charged in connection with Thompson's slaying. 

19w ago / 1:32 PM EST

Person being questioned in Pennsylvania identified

The person being questioned in Altoona has been identified as Luigi Mangione, according to six law enforcement officials with knowledge of the investigation. 

He has not been charged or arrested. 

19w ago / 1:24 PM EST

Man being questioned carried fake N.J. ID with same name used at Manhattan hostel

The man being questioned in Altoona was found carrying a fake New Jersey ID with the name “Marc Rosario,” two senior law enforcement officials said.

Police said last week that the suspected shooter arrived in New York City via bus in late November and had stayed at a Manhattan hostel.

The man who checked into that Manhattan hostel last month also used a fake New Jersey ID with the same name, “Marc Rosario,” three sources familiar with the matter said.