Luigi Mangione’s state murder trial set to start next month in New York City was postponed indefinitely on Aug. 17 after he pleaded guilty to two federal charges in the killing of UnitedHealthcare CEO Brian Thompson.
Judge Gregory Carro issued a brief order after lawyers for Mangione petitioned the court to throw out the case on double jeopardy grounds before the Sept. 8 trial started.
The order gives prosecutors until Oct. 9 to respond to Mangione’s motion.
The judge set the next court meeting for Dec. 10, indicating the trial will not go forward next month.
The date is about a week before he is scheduled to be sentenced in his federal case.
Mangione’s attorneys filed the motion to dismiss the state’s case after their client pleaded guilty in federal court Aug. 14, asking the judge to dismiss the remaining second-degree murder count and the firearms counts “because the particular dual prosecutions here violated Mr. Mangione’s Fifth Amendment Due Process rights.”
Manhattan District Attorney Alvin Bragg, leading the state’s case, didn’t immediately return a request for comment on the judge’s decision to delay the case.
A spokesperson said in an Aug. 14 statement that Bragg’s office was determined to pursue a trial conviction against Mangione in New York State Supreme Court after Mangione’s federal pleadings.
“The Manhattan D.A.’s Office remains committed to seeking justice for Mr. Thompson and his family,” the Manhattan District Attorney spokesperson said.
In federal court on Aug. 14, Mangione, 28, pleaded guilty to two charges of causing the 50-year-old healthcare CEO’s death through stalking.
Thompson was killed in a daylight attack when he was shot in the back on a sidewalk in downtown Manhattan on Dec. 4.
He was walking to a hotel where the UnitedHealth Group was hosting an investor conference on Dec. 4, 2024.
U.S. Attorney for the Southern District of New York Jamie McDonald said Mangione’s guilty plea holds him accountable for the crime.
“Mangione is being held accountable for a heinous crime that claimed an innocent life and drew national attention,” McDonald said in a statement on Aug. 14.
Prosecutors claim Mangione developed and executed a plan to kill Thompson because of his role as CEO of the healthcare company.
Attorney Thomas M. Dickey, who represents Luigi Mangione, speaks to the media outside the Blair County Courthouse in Hollidaysburg, Pa., on Dec. 10, 2024. (Benjamin B. Braun/Pittsburgh Post-Gazette via AP)
Authorities arrested Mangione in Altoona, Pennsylvania.
Luigi Mangione is escorted into Manhattan state court in New York on Sept. 16, 2025. (Seth Wenig/AP Photo)
The judge ruled prosecutors could not seek the death penalty in the case in January.
Thompson’s family released a statement after Mangione pleaded guilty Aug. 14.
“While nothing will ease the pain of losing him, we are grateful that the federal justice system has held the person responsible for this heinous act accountable,” the family said.
“Now we look to the court to ensure that sentencing reflects the severity of this crime.
“We remain mindful that additional proceedings in New York and Pennsylvania are still to come and we will continue to seek the justice Brian deserves.”
Mangione, a former software engineer and Ivy League graduate from a prominent Maryland family, has gained a following online after the murder amplified public frustration over the healthcare industry.
An online charity page has raised $1.57 million for his legal fund as of Aug. 17 to help pay for six attorneys in two states handling his legal matters.
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