The man suspected of killing UnitedHealth Chief Executive Brian Thompson in New York last week has been arrested, according to officials in the city, ending a five-day manhunt.
The suspect, identified as Luigi Mangione, was detained in Altoona, Pennsylvania, after he was seen eating at a McDonald's by an employee of the restaurant who believed he resembled the gunman, officials told a news conference.
The 26-year-old was found with a ghost gun - a firearm assembled from parts, making it untraceable - and a silencer consistent with the weapon used to shoot Mr Thompson, New York City Police Commissioner Jessica Tisch said, as well as clothing and a mask similar to those worn by the killer.
The ghost gun may have been produced by a 3D printer, NYPD Chief of Detectives Joseph Kenny said.
Mr Mangione, a Maryland native, had multiple fraudulent identifications, including a fake New Jersey ID that matched the one used by the gunman to check into a Manhattan hostel days before the shooting, officials added.
Police also found a handwritten document that speaks to "both his motivation and his mindset," Ms Tisch said.
While the document did not mention specific targets, Mr Mangione harboured "ill will toward corporate America," Mr Kenny added.
He was arrested on firearms charges by Altoona police and is scheduled to be arraigned later.
The suspect will likely be extradited to New York at some point to face charges related to the murder.
Mr Thompson, 50, was shot and killed outside a Manhattan hotel last Wednesday by a masked man who appeared to wait for his arrival before attacking him from behind.
The suspect ran from the scene and then cycled a bike into Central Park.
Surveillance video captured him exiting the park and taking a taxi to a bus station in northern Manhattan, where police believe he used a bus to flee the city.
Detectives said that Mr Thompson appeared to be deliberately targeted.
The words "deny," "defend" and "depose" were carved into shell casings found at the scene, several news outlets reported.
The words evoke the title of a book critical of the insurance industry published in 2010 titled "Delay, Deny, Defend: Why Insurance Companies Don't Pay Claims and What You Can Do About It".
Mr Mangione graduated from the University of Pennsylvania in 2020 with bachelor's and master's degrees in engineering, according to a commencement programme.
A Facebook profile that appears to belong to the suspect identified him as a native of Towson, Maryland, and a former student at the University of Pennsylvania.
Photos appear to show him at Stanford University wearing Stanford-branded clothing. Neither university responded to requests for comment.
An X account that appears to be owned by Mr Mangione said that he has an MSE and BSE in computer science from the University of Pennsylvania and lives in Honolulu, Hawaii.
Mr Thompson's murder unleashed a wave of frustration from Americans who have seen their health insurance claims or care denied, faced unexpected costs or paid more for premiums and medical care - all trends that are rising, according to recent data.
The father of two had been CEO of UnitedHealth Group's insurance unit since April 2021, part of a 20-year career with the company.
He had been in New York to attend the company's annual investor conference.
"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," a spokesperson for UnitedHealth said.
