
Luigi Mangione pleaded guilty Friday to federal stalking charges connected to the 2024 killing of UnitedHealthcare CEO Brian Thompson, resolving one of the two criminal cases against him while leaving his upcoming New York state murder trial in question.
Mangione, 28, entered the plea in Manhattan federal court. He faces a potential life sentence, with sentencing scheduled for December 18.
The plea came less than a month before jury selection is scheduled to begin in the separate state case, where Mangione is charged with murdering Thompson.
Guilty Plea Resolves Federal Case
Federal prosecutors accused Mangione of stalking Thompson as part of a plan that ultimately led to the insurance executive’s killing.
During Friday’s hearing, Mangione acknowledged that he posed as an investor to obtain information about an investor conference and later created a 3D-printed gun.
According to an account of the hearing, Mangione told U.S. District Judge Margaret Garnett: “I shot Mr. Thompson in Manhattan.”
He also acknowledged that he understood his actions were illegal and that they would cause Thompson to fear death or serious injury.
The federal case had previously included additional charges, including murder through the use of a firearm, that could have exposed Mangione to the death penalty. A federal judge ultimately dismissed those additional charges.
State Murder Trial Could Be Affected
Mangione’s guilty plea immediately raised questions about whether prosecutors can continue with the state murder case.
The New York case is scheduled to begin jury selection on September 8. Mangione faces murder and other charges stemming from Thompson’s death.
Mangione’s attorneys are expected to argue that allowing the state case to continue would violate protections against double jeopardy, which generally prevent a person from being prosecuted twice for the same offense.
Mangione previously objected to having separate federal and state prosecutions.
During a February court hearing, he said: “One plus one is two.”
“Double jeopardy by any common-sense definition,” he added, per CNBC.
State prosecutors have argued that the charges in the two cases are different and could contend that the state prosecution is not barred by the federal plea.
The legal issue is particularly significant because the state trial was already approaching when Mangione entered his federal plea.
Thompson Killed in Manhattan
Thompson, 50, was fatally shot on December 4, 2024, as he walked to UnitedHealthcare’s annual investor conference at a Manhattan hotel.
Surveillance video showed a masked gunman approaching Thompson from behind and shooting him.
Authorities later said the words “delay,” “deny” and “depose” were written on ammunition recovered in the investigation, echoing language commonly used to criticize insurance companies’ handling of claims.
Mangione’s writings, according to authorities, also contained criticism of the health insurance industry. The case subsequently became a focal point for broader debates over health care and insurance, with Mangione attracting support from some critics of the industry.
Police and UnitedHealthcare have said Mangione was never a customer of the company.
He was arrested five days after Thompson’s killing at a McDonald’s in Altoona, Pennsylvania, about 230 miles west of Manhattan.
Evidence in the Case
Federal prosecutors have pointed to evidence seized from Mangione after his arrest, including a 3D-printed pistol investigators said matched the weapon used in Thompson’s killing.
Authorities also recovered a notebook that prosecutors say contained writings describing Mangione’s intent to kill an insurance executive.
Judge Garnett previously ruled that prosecutors could use items recovered from Mangione’s backpack as evidence.
Mangione’s state defense team had also considered pursuing a psychiatric defense based on extreme emotional disturbance but reversed course in June. That defense is not available in the federal case.
The federal plea closes one part of the prosecution against Mangione, but whether he will still face a state murder trial remains unresolved.
Provided by Dallas Express






