Luigi Mangione’s ‘different crimes’ mean double jeopardy does not apply to him, state prosecutors say

Luigi Mangione is expected to be tried in state court for fatally shooting United Healthcare CEO because the killing “had nothing to do” with the federal harassment charges he pleaded guilty to in August, Manhattan prosecutors said in a court filing Friday.

“The marked differences in definitions between these federal and state laws thus demonstrate the different goals of the two regimes,” wrote Joel Seidemann, lead prosecutor in the Manhattan District Attorney’s Office.

Mangione’s lawyers asked New York State Judge Gregory Carro to dismiss the murder and weapons charges, arguing that under the state’s double jeopardy laws he cannot be prosecuted twice for the same crime. Mangione pleaded guilty to two federal stalking charges in August and admitted that he traveled to New York “with the intention of shooting Brian Thompson.”

Seidemann argued that murder and stalking are different crimes and that double jeopardy would not apply. To support his argument, he cited arguments Mangione’s lawyers used to convince the federal judge to drop federal murder and weapons charges, which took the death penalty off the table.

The federal murder charge is based on the fact that it is a violent crime that must also be charged in the indictment. Mangione’s legal team successfully argued at the time that the two stalking charges underlying the federal indictment did not constitute violent crimes.

The prosecutor’s office argues that the defense’s arguments prove that the state’s charge of second-degree murder — a violent crime — is inherently different from his federal stalking conviction. Specifically, prosecutors argued that proving a defendant’s intent is necessary to support a murder charge at the state level, but that it is not necessary to prove stalking charges at the federal level.

“In a word, the essence of federal harassment or cyberstalking has nothing to do with murder, and the essence of state murder has nothing to do with harassment or cyberstalking: different harms, different evils, different goals, different crimes,” Seidemann wrote. State law, he said, “permits the prosecution of the accused for murder to continue in the state.”

The gun charges should also stand, prosecutors say, because U.S. District Judge Margaret Garnett had already excluded the gun charge from Mangione’s federal indictment before he pleaded guilty, so he was never “separately prosecuted” for that conduct.

The DA’s office requested that if Carro dismisses the charges, it does so without prejudice so that state prosecutors can refile an indictment against Mangione if his federal conviction is overturned or overturned on appeal after his December conviction.

Prosecutors also rejected Mangione’s suggestion that he couldn’t present a defense to the state’s claim — potentially that he was suffering from extreme emotional distress at the time of the shooting — because it could be used against him in the federal trial where a psychological defense is not allowed.

“The evidence in this case establishes beyond doubt that this was a long-planned, well-choreographed murder,” prosecutors wrote.

Mangione, 28, was arrested at a McDonald’s in Altoona, Pennsylvania, in December 2024, ending a days-long manhunt after Thompson was shot and killed in midtown Manhattan.

Authorities said they found key evidence in Mangione’s backpack that linked him to the shooting, including a 3D-printed gun that matched shell casings from the crime scene and a notebook with writings expressing animosity toward the health care industry and intent to carry out an attack.

Friday’s filing says prosecutors from the DA’s office traveled to Altoona the same day as Mangione’s arrest. Over five days, prosecutors presented evidence and called 25 witnesses before a New York grand jury to obtain an indictment.

The case attracted national attention and highlighted the frustrations of some Americans with the health care system, as Mangione saw an outpouring of support from dedicated supporters who sympathized with Mangione’s cause.

The potential argument of double jeopardy permeated pretrial hearings, with prosecutors suggesting the defense was using delaying tactics to invoke double jeopardy.

Mangione’s lawyers have repeatedly expressed concerns about the dual prosecution, arguing that their client was being unfairly tried twice for the same crime. Mangione himself even raised this issue in an outburst at a public hearing in February: “Same trial twice. One plus one equals two. Double punishment by any definition of common sense,” he said while handcuffed outside the courtroom.

State prosecutors insisted that the trial begin first because if it followed the federal trial, their case could be thrown out on double jeopardy grounds. The courts ultimately set a September start date for the state trial, followed by the federal trial in January 2027.

But in August, Mangione confessed to the murder and pleaded guilty to two stalking charges, avoiding federal trial. His legal team immediately filed a motion to dismiss much of the state’s case on grounds of double jeopardy, prompting the judge to effectively postpone the state’s trial while the parties argue the issues.