Open this photo in gallery:

Luigi Mangione during an evidence hearing in Manhattan Criminal Court in December, 2025.Curtis Means/The Associated Press

Luigi Mangione spoke out in court Friday against the prospect of back-to-back trials over the killing of UnitedHealthcare CEO Brian Thompson, telling a judge: “It’s the same trial twice. One plus one is two. Double jeopardy by any commonsense definition.”

Mr. Mangione, 27, made the remarks as court officers escorted him out of the courtroom after a judge scheduled his state murder trial to begin June 8, three months before jury selection in his federal case.

Judge Gregory Carro, matter-of-fact in his decision after a lengthy discussion with prosecutors and defence lawyers at the bench, said the state trial could be delayed until Sept. 8 if an appeal delays the federal trial.

Mr. Mangione’s lawyers objected to the June trial date, telling Mr. Carro that at that time, they’ll be consumed with preparing for the federal trial, which involves allegations that Mr. Mangione stalked Mr. Thompson before killing him.

“Mr. Mangione is being put in an untenable situation,” defence lawyer Karen Friedman Agnifilo said. “This is a tug of war between two different prosecution offices.”

“The defence will not be ready on June 8,” she added.

“Be ready,” Mr. Carro replied.

Mr. Mangione has pleaded not guilty to state and federal charges, both of which carry the possibility of life in prison. Last week, the judge in the federal case ruled that prosecutors can’t seek the death penalty.

Luigi Mangione will not face death penalty if convicted, judge rules

Jury selection in the federal case is set for Sept. 8, followed by opening statements and testimony on Oct. 13.

Wearing a tan jail suit, Mr. Mangione sat quietly at the defence table until his outburst at the end of the hearing.

As the trial calendar began to take shape, Assistant District Attorney Joel Seidemann sent a letter to Carro asking him to begin the New York trial on July 1.

The prosecutor argued that the state’s interests “would be unfairly prejudiced by an unnecessary delay” until after the federal trial. Under the law, he said, the state has “priority of jurisdiction for purposes of trial, sentencing and incarceration” because Mr. Mangione was arrested by New York City police, not federal authorities.

When Mr. Mangione was arrested, federal prosecutors said anticipated that the state trial would go first. Seidemann told Mr. Carro on Friday that Thompson’s family has also expressed a desire to see the state trial happen first.

“It appears the federal government has reneged on its agreement to let the state, which has done most of the work in this case, go first,” Mr. Carro said Friday.

Scheduling the state trial first could help Manhattan prosecutors avoid double jeopardy issues. Under New York law, the district attorney’s office could be barred from trying Mr. Mangione if his federal trial happens first.

The state’s double jeopardy protections kick in if a jury has been sworn in a prior prosecution, such as a federal case, or if that prosecution ends in a guilty plea. The cases involve different charges but the same alleged course of conduct.

Mangione isn’t due in court again in the state case until May, when Mr. Carro is expected to rule on a defence request to exclude certain evidence that prosecutors say connects Mr. Mangione to the killing.

Those items include a nine millimetre handgun that prosecutors say matches the one used to kill Mr. Thompson and a notebook in which they say he described his intent to “wack” a health insurance executive.

Last week, Mr. Garnett ruled that prosecutors can use those items at that trial.

In September, Mr. Carro threw out state terrorism charges but kept the rest of the case, including an intentional murder charge.

Mr. Thompson, 50, was killed on Dec. 4, 2024, as he walked to a midtown Manhattan hotel for UnitedHealth Group’s annual investor conference.

Surveillance video showed a masked gunman shooting him from behind. Police say “delay,” “deny” and “depose” were written on the ammunition, mimicking a phrase used to describe how insurers avoid paying claims.

Mr. Mangione, a University of Pennsylvania graduate from a wealthy Maryland family, was arrested five days later at a McDonald’s in Altoona, Pennsylvania, about 370 kilometres west of Manhattan.

Follow related authors and topics

Authors and topics you follow will be added to your personal news feed in Following.

Interact with The Globe