Prosecutors in New York City charged the defendant, UnitedHealthcare CEO Luigi Mangione, with murder late Monday night, according to online court records.

Charges were also brought against the 26-year-old criminal possession of a weapon (loaded firearm)Possession of a forged instrument and criminal possession of a weapon (silencer of a firearm) in the brazen shooting of Brian Thompson on December 4th.

Thompson, 50, was shot in the back on the sidewalk outside a Hilton hotel in New York before a shareholder conference. He was named CEO of the company in April 2021.

Mangione was arrested Monday in Altoona, Pennsylvania, after a five-day nationwide manhunt for Thompson’s killer.

MURDER SUSPECT, UNITEDHEALTHCARE CEO, ARRESTED AT MCDONALD’S IN PENNSYLVANIA

A still from a video shows 26-year-old Luigi Mangione being brought into a Pennsylvania courthouse Monday evening after being questioned in connection with the killing of UnitedHealthcare CEO Brian Thompson. (Fox News)

Altoona Police Detective Tyler Frye took Mangione into custody after an employee and a customer at a McDonald’s in town believed he looked like the suspect in a wanted poster and called authorities.

When officers approached Mangione, who was wearing a mask and cap and working on a laptop in the back of the restaurant, and asked him to remove his face covering, they recognized him as the suspect wanted for questioning in Thompson’s killing.

During that encounter, he allegedly handed out a fake ID, gave a false name, and “went quiet and started shaking” when asked if he had recently been to New York.

He was also allegedly in possession of writings criticizing the health care industry and a ghost gun similar to the one believed to have been used to kill Thompson.

Luigi Mangione was charged late Monday night in New York City with multiple crimes, including first-degree murder, in connection with the shooting of UnitedHealthcare CEO Brian Thompson.

Altoona police initially took Mangione into custody on charges unrelated to Thompson’s murder – possession of an unlicensed firearm, false identification to police and forgery.

WHO IS LUIGI MANGIONE, SUSPECTED IN THE MURDER OF UNITEDHEALTHCARE CEO?

According to video of the ceremony, Mangione graduated from Baltimore’s elite Gilman School as valedictorian and even gave the commencement speech at his 2016 graduation.

“He seemed like a smart kid, he always did the right thing, it seemed,” a former classmate shocked by the arrest told Fox News Digital Monday. “Wasn’t crazy.”

He then graduated from the University of Pennsylvania with bachelor’s and master’s degrees in engineering and was a member of the Eta Kappa Nu Honor Society for Electrical and Computer Engineering.

A photo obtained by Fox News Digital shows Luigi Mangione, the accused killer of UnitedHealthcare CEO Brian Thompson. (Obtained from Fox News Digital)

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Mangione is scheduled to be extradited to New York on Tuesday.

Fox News Digital’s Michael Ruiz and Brooke Curto contributed to this report.