The person of interest in the New York City slaying of UnitedHealthcare CEO Brian Thompson is facing additional charges of murder and other charges in Manhattan, according to an online court docket filed by city prosecutors late Monday night.

Earlier in the day, the suspect was also charged with a variety of offenses in Pennsylvania, where he was apprehended.

The Commonwealth of Pennsylvania police criminal complaint alleged that 26-year-old Luigi Mangione committed forgery, carried a firearm without a license, tampered with records or identification, possessed instruments of crime, and falsely identified himself to law enforcement.

Mangione was apprehended at a McDonald’s in Altoona, Pennsylvania, after law enforcement received a tip from an employee.

According to the complaint, Mangione was looking at a silver laptop while wearing a blue medical mask. A backpack sat on the floor nearby.

He first identified himself as Mark Rosario, providing an ID with that name.

The complaint states that Mangione “became quiet and started to shake” when asked if he had recently been in New York. He then provided identification bearing his name.

The complaint states that he had a backpack that contained a 3D-printed black pistol along with a black silencer, also 3D-printed. A Glock magazine with six rounds was inside the pistol.

Thompson was shot and killed by a masked gunman on the streets of Manhattan on Dec. 4 in what law enforcement believes was an assassination. Mangione will eventually be extradited to New York, though the timeline for that remains unclear.

Mangione is the grandson of the late Nick Mangione, Sr., who rose from a poor background to making millions in real estate. The Mangione family owns a local talk radio station, WCBM AM, as well as the Hayfields Country Club and the Turf Valley Resort, both in Maryland.

Mangione attended the private Gilman School, where he was valedictorian in 2016. He went on to earn an undergraduate degree from the University of Pennsylvania with a bachelor’s and master’s degree. He has ties to San Francisco, with a resume indicating he was an artificial intelligence research assistant at Stanford University.

His last known address was in Honolulu, Hawaii.

In a news conference following Mangione’s arraignment, Pennsylvania Gov. Josh Shapiro condemned political violence, including the attempted assassination of President-elect Donald Trump in Butler, Pennsylvania, earlier this year.

As some on social media lauded the shooting of an executive in the health care industry, Shapiro said that the individual responsible “is a coward, not a hero.”

He also defended Thompson, saying he was being cast as “an avatar of a system that is disliked by many.”

“He was a father. He was a husband. He did not deserve to die like this on a sidewalk in New York City,” Shapiro said.

“Some of these detectives ... haven’t been home since Tuesday, when this incident happened,” said New York Police Department Deputy Commissioner Kaz Daughtry, gesturing to the law enforcement officers clustered behind him.

Blair County District Attorney Peter Weeks said he expects homicide charges to be filed in the case “in the very near future.”

Lt. Col. George Bivens of the Pennsylvania State Police clarified that Mangione was noticed by a customer, who then alerted an employee who contacted law enforcement.

Police officer Tyler Frye of the Altoona Police Department, who, with officer Joseph Detwiler apprehended Mangione, said he and his partner “didn’t even think twice about it” after the suspect pulled down his mask.

“We knew that was our guy,” said Frye, who is only half a year into his service with the local police department.

“It feels good to get a guy like that off the street,” he said.

This booking photo released on Dec. 9, 2024, by the Pennsylvania Department of Corrections shows Luigi Mangione, a suspect in the fatal shooting of UnitedHealthcare CEO Brian Thompson. (Pennsylvania Department of Corrections via AP)

Officials confirmed that Mangione has not made any statements. A three-page handwritten document in his possession at the time of his arrest “speaks to both his motivation and mindset,” according to New York Police Department Commissioner Jessica Tisch, who spoke at a previous press conference earlier in the day.

The Associated Press contributed to this report.