BREAKING: Suspect in UnitedHealthcare CEO murder revealed as Luigi Mangione, has manifesto railing against healthcare industry

He was found at a McDonald's, where he was an employee, with a "ghost gun" that can fire 9mm rounds and a suppressor similar to those police believe was used in the attack on Thompson. While he is being held in Pennsylvania, the man would be expedited to New York City to face charges. The man is 26-years-old and was using a fake ID. He was arrested by local police but not yet charged and was found to have four fake IDs in his possession.

"It seems that he had some ill-will toward corporate America," said NYPD officials in a press conference. As for the document, officers said that is still in the possession of the officers in Pennsylvania. "Mangione had a particularly personal reason to hate the medical community — its treatment of an ailing relative, sources said," per the New York Post. While in high school, he worked at an assisted-living home.

They are still searching his social media and the document, the officer said, was handwritten. Mangione has ties to Pennsylvania, Maryland, California and Hawaii. There has been no indication of prior arrests. He lost his grandmother and grandfather in 2013 and 2017, respectively.

"We're still working this investigation very hard," said the officer in response to questions as to his motivation or if he had inside information. They beleive that he was acting alone. "The use of drones in Central Park," he said, was instrumental, as was the surveillance footage from "hundreds" of cameras around the city.

Mangione reportedly went to the University of Pennsylvania and was the valedictorian of his high school class, per the New York Post. The outlet also reported that he was from Towson, MD. The Post also reports that on his Goodreads profile, Mangione "shows quotes he particularly likes ranging from Socrates to Bruce Lee — to wacky anti-establishment Ted Kaczynski, the infamous 'Unabomber' who terrorized the country for nearly two decades by planting deadly bombs before he was nabbed in 1996."

While at UPenn, he was interviewed by Penn Today, in an article that the school has now deleted from their site. He was asked about his interest in video games and how he taught himself to program. He was a computer science major at Penn and while there, he decided to lauch a student-run video game development club, called UPGRADE.

Brian Thompson was shot on Sixth Avenue in the early morning hours of Wednesday when he was attending a conference. He leaves behind a wife and two sons. The man who shot him appeared to be "laying in wait," said NYPD Commissioner Jessica Tisch. As he let others go by, per surveillance footage, only approaching Thompson, it became clear that this was a targeted attack.

The man is being held in Altoona by police and is being questioned. The shooter is believed to have left New York shortly after the shooting. Once he committed his fatal act, he took off on a bike for Central Park, where there are substantially less surveillance cameras than in the rest of the city. He ditched his backpack in the park before heading for an uptown bus station, near the George Washington Bridge. He was seen entering the station, but not leaving it, leading police to the conclusion that he'd taken a one-way bus ticket out of town.