Luigi Mangione, a 26-year-old ex-student from an Ivy League school, is said to have given up a promising career in computer science to carry out an attack on UnitedHealthcare CEO Brian Thompson. He is now facing more legal trouble as both state and federal prosecutors are intensifying their charges and revealing new evidence.
The latest federal criminal complaint lists charges of stalking, murder using a firearm, and federal firearms violations against Mangione. It alleges that he had a journal where he detailed his plan, contemplated his choice of victim, and congratulated himself on researching the target.
The new federal case brings the potential for the death penalty back into the equation, should Mangione be convicted.
“This investor conference is a real stroke of luck,” reads one of the entries in the journal as cited in the affidavit. “And – most importantly – the message becomes clear on its own.”
“P.S. you can check serial numbers to verify this is all self-funded,” the Feds letter continued. “My own ATM withdrawals.”
Investigators allegedly recovered about $10,000 in cash during Mangione’s arrest by police in Altoona, Pennsylvania. He denied it was his in court.
His defense team, however, argued that New York’s first-degree murder charge, which includes an allegation of terrorism, is an overreach. The federal charges go even further.
“The federal government’s reported decision to pile on top of an already overcharged first-degree murder and state terror case is highly unusual and raises serious constitutional and statutory double jeopardy concerns,” his New York defense attorney, Karen Friedman Agnifilo, told Fox News. “We are ready to fight these charges in whatever court they are brought.”
The federal complaint repeats some details stated by Manhattan prosecutors and the NYPD and lays out a clear timeline.
A photo of the fake ID police allege Luigi Mangione used to check into a Manhattan hostel before the murder of UnitedHealthcare CEO Brian Thompson. (FBI)
Mangione allegedly came to New York from Atlanta, Georgia, arriving at the Port Authority Bus Terminal in Manhattan around 10 p.m. on Nov. 24. The first place he went from there was to the Midtown Hilton hotel where the murder would take place, according to authorities. Then he took a cab to a hostel on the Upper West Side.
He checked in under the fake name “Mark Rosario,” according to court documents, showed a fake ID and paid cash. However, when a clerk at the hostel asked him to take off his mask so she could see his face, he did – in front of a surveillance camera. That image circulated widely after the NYPD asked for the public’s help identifying a suspect and ultimately led to Mangione’s arrest.
The suspected gunman in UnitedHealthcare CEO Brian Thompson’s murder, believed to be Luigi Mangione, is seen flirting with a hostel employee on surveillance footage before the Dec. 4 shooting. (NYPD)
The entire rest of the time he spent in New York, the suspect “consistently kept his mask on…including while inside the hostel.”
On the day of the murder, Dec. 4, Mangione allegedly left the hostel carrying a gray backpack and riding an electric bike around 5:35 a.m. Police used multiple surveillance cameras to track his route from the Upper West Side to the Midtown Hilton.
Around 5:41 a.m., Mangione was allegedly seen walking near the crime scene and making a purchase at a nearby coffee shop.Â
“On at least one occasion, prior to the murder, the Shooter was depicted using a cellphone,” according to the affidavit.Â
At around 6:45 a.m., Thompson arrived outside the hotel. Mangione had allegedly been waiting for nearly an hour. He allegedly gunned down the victim, fled on foot to West 55th Street, got on the electric bike and rode north. He disappeared into Central Park for an unspecified time period and emerged near West 77th Street and Central Park West, riding the bike but without the gray backpack.
Just before 7 a.m., he ditched the bike, and within minutes hailed a taxi that drove him to the George Washington Bridge Bus Terminal in Upper Manhattan. A surveillance camera in the taxi took a picture of his masked face.
The suspect in the UnitedHealthcare CEO assassination, later identified as Luigi Mangione, pictured by a taxi cab’s security camera looking into the front from the passenger seat in the rear. (FBI)
Surveillance video shows a gunman step out from between two parked cars, walk up behind Thompson and shoot him from behind, striking him in the back and the leg. Thompson’s expected presence at an investor conference scheduled for 8 a.m. that morning had been public information.Â
Police recovered spent shell casings and at least one live round with the words “deny,” “delay” and “depose” written on them – a possible reference to a book that was critical of the insurance industry.
The handgun and 3D-printed suppressor that the FBI says were recovered during the arrest of Luigi Mangione by the Altoona Police Department in Pennsylvania. (FBI)
“I respectfully submit that MANGIONE is the Shooter who shot and killed the Victim on December 4, 2024,” an FBI agent wrote in the affidavit. “Additionally, the Notebook entries, the Feds Letter, the Shooter’s apparent surveillance of the Midtown Hotel on November 24, 2024 and December 4, 2024, and the Shooter’s use of countersurveillance techniques and escape from New York City all suggest that the Shooter undertook extensive efforts to identify the Victim, place the Victim under surveillance, and track the Victim’s whereabouts in the time period leading up to the murder.”
Luigi Mangione shouts while officers restrain him as he arrives for his extradition hearing at Blair County Courthouse in Hollidaysburg, Pennsylvania on Tuesday, Dec. 10, 2024. (David Dee Delgado for Fox News Digital)
The federal charges include two counts of stalking, travel in interstate commerce and use of interstate facilities, murder through use of a firearm and a federal firearms offense. They come shortly after Mangione was indicted on first- and second-degree murder and domestic terror charges in New York.
“Manhattan DA Alvin Bragg was handling three of the biggest trials in the country: the Trump hush money case, Daniel Penny, and Mangione, but Trump’s newly appointed Attorney General and Manhattan U.S. Attorney will be swooping in shortly,” said Neama Rahmani, a former federal prosecutor who now runs a private practice that frequently places him on the opposite side of insurance companies like UnitedHealthcare in court.
“Federal charges change the game. New York doesn’t have the death penalty, but the federal government does. The feds may be trying to send a message to Mangione to take a plea to take the death penalty off the table.”
Paul Mauro, a former NYPD inspector who has been following the case closely, said the Justice Department may be taking early steps to take over the case, knowing President-elect Donald Trump and new DOJ leadership will take office next month.
A surveillance image released by the NYPD shows the suspect in the shooting death of United Healthcare CEO Brian Thompson on Wednesday, Dec. 4, 2024. (NYPD Crimestoppers)
“I do not see how Alvin Bragg’s case survives,” he told Fox News Digital. “They can talk all they want about ‘parallel cases,’ but as a practical matter, that’s not going to work. And if anyone thinks that a Donald Trump DOJ will take a back seat to Alvin Bragg’s office, I would suggest they have not been reading the news lately.”
The state charges will remain an option, however, Manhattan prosecutors may ultimately decide to let the feds keep control.
“Bragg’s case might be brought at some point in the future, but the determination will have to be made if, by then, it’s worth it,” Mauro said.
Authorities in New York and Pennsylvania have both condemned widespread online support for Mangione, who is accused of sneaking up on a father of two and shooting him from behind with a handgun and homemade silencer.Â
“Luigi Mangione is now formally charged and indicted for murder, and let me be perfectly clear, in the nearly two weeks since Mr. Thompson’s killing, we have seen a shocking and appalling celebration of cold-blooded murder,” NYPD Commissioner Jessica Tisch told reporters Wednesday. “Social media has erupted with praise for this cowardly attack.”
Mangione was taken to a Manhattan federal court after arriving in New York. His lawyers declined to comment after the hearing.
“Respectfully decline to make any comment at this point,” Friedman Agnifilo told reporters. “Mangione appreciates support.”
