Mangione defense team abandons psychiatric strategy ahead of trial
Mangione's defense team withdraws psychiatric strategy as murder trial preparations continue.
Event / Security
Luigi Mangione Murder Trial
Luigi Mangione faces murder charges for the December 2024 killing of UnitedHealthcare CEO Brian Thompson. His trial begins September 2026 with a psychiatric defense strategy that could reduce charges to manslaughter if successful.
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2026-08-16 to 2026-11-13 · UTC publication dates
Coverage begins 18 Jun, 00:04 UTC
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What happened
Luigi Mangione's state trial scheduled for September
Luigi Mangione's New York state murder trial is scheduled to begin in early September. A separate federal trial is expected to take place later.
Luigi Mangione pleaded not guilty to murdering UnitedHealthcare CEO Brian Thompson
Luigi Mangione, age 28, has pleaded not guilty to murdering Brian Thompson, CEO of UnitedHealthcare, who was killed on a Manhattan street in 2024. Thompson was a father of two.
Judge orders disclosure of psychiatric information before trial
Judge Gregory Carro ordered Mangione's attorneys to quickly share psychiatric information with prosecutors, stating prosecutors need to know what medical condition the defendant suffers from and how it triggered extreme emotional distress. The judge indicated he would not allow surprises on the eve of trial. Assistant Manhattan District Attorney Joel Seidemann complained that Mangione's team was withholding medical information about his psychiatric state.
Court sealing orders for psychiatric records remain in effect
Judge Gregory Carro issued a signed order to keep sealed certain transcripts, emails, and documents related to Mangione's potential psychiatric defense. Carro had previously indicated these records would be made public, but reversed course after the defense withdrew its psychiatric defense strategy.
Luigi Mangione's defense team withdraws psychiatric defense strategy
Luigi Mangione's legal team withdrew its plan to present a psychiatric defense in his New York state murder trial. The defense had previously indicated it would argue that Mangione killed UnitedHealthcare CEO Brian Thompson while experiencing extreme emotional disturbance, which could have reduced the charges from murder to first-degree manslaughter. The withdrawal came in a one-line letter to Judge Gregory Carro on Thursday, one day after a Wednesday hearing where the defense had confirmed Mangione was undergoing psychiatric evaluation.
Terrorism charges dismissed against Luigi Mangione
Judge Gregory Carro dismissed two terrorism-related charges against Mangione: murder in the first degree in furtherance of an act of terrorism and murder in the second degree as a crime of terrorism. The judge ruled that Mangione's targeted killing of one individual does not meet the standards for terrorism charges.
Judge rules gun and notebook evidence admissible in Mangione trial
Justice Gregory Carro ruled that key evidence recovered during a subsequent search of Mangione's backpack can be used at trial, including a gun and a red notebook containing diary entries. Prosecutors say the notebook contains entries that illuminate Mangione's decision to target the healthcare executive.
Luigi Mangione charged with murdering UnitedHealthcare CEO Brian Thompson
Luigi Mangione, 28, was charged with nine felony counts including second-degree murder for the fatal shooting of UnitedHealthcare CEO Brian Thompson outside a Midtown Manhattan hotel on December 4, 2024. Mangione was arrested at a Pennsylvania McDonald's following a five-day manhunt.
Luigi Mangione's defense will pursue extreme emotional disturbance strategy
At a court hearing on June 17, Luigi Mangione's defense attorneys announced they will argue he was suffering from extreme emotional disturbance at the time of the alleged killing. If successful, this defense could result in conviction for manslaughter instead of murder, significantly reducing his potential prison sentence.
Mangione's New York state murder trial scheduled to begin in September
Luigi Mangione's trial on state murder charges in the death of UnitedHealthcare CEO Brian Thompson is scheduled to begin on September 8 before Justice Gregory Carro in Manhattan.
Judge dismisses ammunition magazine charge against Mangione
Acting New York Supreme Court Justice Gregory Carro dismissed a criminal charge related to possession of a large capacity ammunition magazine. The judge had previously ruled that evidence found during an initial search of Mangione's backpack, including the magazine, cell phone, passport and wallet, must be suppressed.
Mangione faces separate federal charges in addition to state trial
Luigi Mangione faces separate charges in Pennsylvania and in federal court. His federal trial, involving stalking charges, is scheduled to begin on October 13. A federal judge previously threw out murder and weapons charges on legal technicalities.
Diary entries reveal Mangione's stated intentions regarding healthcare executive
Prosecutors have referenced diary entries allegedly written by Mangione that express frustrations with the healthcare insurance sector and describe his intentions to target a healthcare executive. Writings found on shell casings at the scene included the words 'DENY,' 'DEPOSE,' and 'DELAY.'
Mangione's state trial scheduled to begin September 8, 2026; federal trial October 13, 2026
Luigi Mangione's state trial for murder is scheduled to begin on September 8, 2026 with jury selection. His federal trial involving stalking charges is set to begin on October 13, 2026. He faces potential life imprisonment if convicted in either case.
Mangione pleads not guilty to state and federal charges
Mangione, 28, has pleaded not guilty to state and federal charges in connection with the December 4, 2024 killing of Brian Thompson. State charges include second-degree murder, criminal possession of a weapon, and criminal possession of a forged instrument. Federal charges include two counts of interstate stalking.
Brian Thompson, UnitedHealthcare CEO, shot and killed in Manhattan on December 4, 2024
Brian Thompson, 50, UnitedHealthcare CEO, was fatally shot while walking to a Manhattan hotel to attend UnitedHealth Group's annual investor conference. Surveillance video showed a masked gunman shooting him from behind. The ammunition had 'delay,' 'deny' and 'depose' written on it, phrases commonly used to describe how insurers avoid paying claims.
Luigi Mangione to assert psychiatric defense at state murder trial for UnitedHealthcare CEO Brian Thompson
Luigi Mangione, 28, will assert a psychiatric defense at his state murder trial for the December 4, 2024 killing of UnitedHealthcare CEO Brian Thompson. Judge Gregory Carro announced on June 17, 2026 that Mangione's lawyers informed him they will attempt to show he was suffering from extreme emotional disturbance at the time of the killing. If successful, Mangione could be sent to a psychiatric treatment facility instead of prison, and his second-degree murder charge would be reduced to first-degree manslaughter with a maximum sentence of 25 years.
Judge dismisses gun magazine charge against Mangione
Judge Gregory Carro dismissed a charge related to a gun magazine on June 17, 2026, ruling it inadmissible because it was found during an initial search of Mangione's backpack at the McDonald's where he was arrested.
Luigi Mangione arrested in Pennsylvania five days after Thompson's killing
Luigi Mangione, an Ivy League graduate from a wealthy Maryland family, was arrested on December 9, 2024 at a McDonald's in Altoona, Pennsylvania, approximately 230 miles west of Manhattan. He went on the grid for months prior to the incident.
Evidence linking Mangione to Thompson's killing includes 3D-printed pistol and notebook
Prosecutors presented evidence linking Mangione to Thompson's killing, including a 3D-printed pistol that matches the gun used in the murder and a notebook describing wanting to 'wack' a health insurance executive and rebelling against 'the deadly, greed fueled health insurance cartel.' Judge Carro ruled on May 18, 2026 that both items can be used as evidence.
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2 alternative perspectives
Mangione defense strategy centers on extreme emotional disturbance claim
Mangione's defense pursues extreme emotional disturbance claim based on diary evidence.
Mangione faces state murder trial in September, federal charges pending
Mangione's state murder trial begins September 2026; federal charges proceed separately in October 2026.
Mangione to mount psychiatric defense in UnitedHealthcare CEO murder trial
Mangione asserts psychiatric defense in Thompson murder trial beginning September 2026.