Fingerprints found at the murder scene of UnitedHealthcare CEO Brian Thompson in New York City match those of murder suspect Luigi Mangione, a law enforcement source tells PEOPLE.
The source did not immediately say where the fingerprint came from, but CNN previously reported that police recovered a partial print from a water bottle that had been discarded near the shooting site in Midtown Manhattan.
Mangione, 26, is charged in New York with second-degree murder, firearms possession and forgery, according to an arrest warrant from the Manhattan district attorney's office.
He was arrested on Monday, December 9, after being recognized at a McDonald's in Altoona, Pennsylvania, where an employee called police.
After Mangione was arrested in Altoona, authorities said they discovered in his possession a 9mm “ghost gun” – similar to the one used to shoot Thompson – as well as several fake IDs. A police source tells PEOPLE that he also brought with him a three-page “manifesto” critical of the health insurance industry.
Mangione's defense attorney Thomas Dickey continued Good morning America On Wednesday, December 11, he said he had “seen no evidence linking Mangione to the murder.”
“As I indicated yesterday, I have no evidence linking the weapon found on him to the crime,” he said. “These are things we want to see. Yesterday was quick, today is a new day. We look forward to beginning our investigation into what evidence may or may not exist.”
The Ivy League graduate is also charged in Pennsylvania with carrying a weapon and showing a fake ID to a police officer. He was arraigned Tuesday, Dec. 10, at a courthouse near Altoona and was denied bail. His lawyer also indicated he would fight attempts to extradite him to New York to face murder charges. Mangione has not yet entered a plea.
As he was brought into court on Tuesday, Mangione appeared to shout a message to members of the media.
“It’s completely contactless! It’s an insult to the intelligence of the American people!” Mangione appeared to shout in a video captured by news cameras. It is not clear what Mangione was referring to.
The murder charge is related to the Dec. 4 killing of 50-year-old Thompson, the chief executive of one of America's largest health insurers.
The CEO was shot outside New York's Hilton Midtown Hotel in Manhattan, where he and other executives were meeting for an investor meeting. The father of two was pronounced dead a short time later at a local hospital.
Shell casings found at the scene were reportedly engraved with the words “deny,” “defend” and “depose” – a possible reference to “deny, delay, defend,” a phrase that describes the insurance industry's tactics to avoid claims.
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Authorities believe Mangione, who allegedly fled the crime scene on a bicycle through Central Park before fleeing the city, intentionally targeted Thompson. In the alleged manifesto, Mangione claims he acted alone.
Multiple reports have claimed Mangione has been struggling with “debilitating” back pain in recent years as friends and family have lost contact with him in recent months.
