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Jun 18, 20261
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Luigi Mangione Abandons Psychiatric Defense in UnitedHealthcare CEO Murder Trial
Luigi Mangione's lawyers abandoned their planned psychiatric defense in the UnitedHealthcare CEO murder trial just one day after announcing it, formally withdrawing the claim of extreme emotional disturbance. The defendant remains charged with murder in the December 2024 killing of Brian Thompson and has pleaded not guilty to state and federal charges.
Quick Facts
Who
Luigi Mangione
What
Mangione's lawyers withdrew psychiatric defense
When
December 4, 2024 (killing)
Where
New York
- Mangione's lawyers withdrew psychiatric defense
- Defense announced extreme emotional disturbance claim, then retracted it
- Judge ordered unsealing of secret hearing transcript
- Brian Thompson was shot and killed
- Mangione arrested in Pennsylvania
Luigi Mangione's legal team has reversed course, withdrawing plans to pursue a psychiatric defense at his state murder trial in the killing of UnitedHealthcare CEO Brian Thompson. The 28-year-old Ivy League graduate's lawyers informed Judge Gregory Carro on Thursday that they would no longer assert claims of extreme emotional disturbance at the time of the December 4, 2024, killing. This reversal came just one day after the defense team had informed the judge of their intention to pursue such a defense.
The withdrawal occurred as Mangione's lawyers faced a Thursday deadline to provide prosecutors with information supporting the emotional disturbance claim. The decision followed Judge Carro's order to unseal a transcript of a secret hearing held on June 3 regarding the psychiatric defense. Karen Friedman Agnifilo, one of Mangione's attorneys, filed a letter formally stating the defense "respectfully withdraws" its notice under New York's psychiatric defense statute. The Manhattan district attorney's office declined to comment on the reversal.
Had the defense proceeded, an emotional disturbance finding would not have absolved Mangione of killing Thompson but could have reduced his sentence significantly. If accepted by a jury, such a defense would require conviction on the lesser charge of manslaughter, punishable by up to 25 years in prison, rather than murder, which carries a potential life sentence. Notably, this defense differs from a not guilty by reason of insanity plea, which could result in psychiatric facility placement instead of prison.
Mangione, who has pleaded not guilty to both state and federal charges, faces a state trial scheduled to begin September 8 and a federal trial on stalking charges set for October 13. During Wednesday's hearing, his attorney had protested the unsealing of psychiatric defense materials, arguing it could prejudice his federal case, where an extreme emotional disturbance defense is unavailable.
Thompson, 50, was shot while walking to a Manhattan hotel for UnitedHealth Group's annual investor conference on December 4, 2024. Surveillance footage captured a masked gunman shooting him from behind. Ammunition discovered bore the words "delay," "deny," and "depose"—terms associated with insurance claim denial tactics. Mangione, arrested five days later at a Pennsylvania McDonald's, faces allegations linked to a 3D-printed pistol matching the murder weapon and a notebook describing intentions to target health insurance executives and oppose "the deadly, greed fueled health insurance cartel."
Why This Matters
This reversal is strategically significant for Mangione's legal defense and sentencing prospects. An emotional disturbance defense could have reduced his sentence from a potential life sentence for murder to a maximum of 25 years for manslaughter. By withdrawing this defense just before the Thursday deadline to provide supporting evidence, Mangione's team may be signaling a shift in strategy, possibly to focus on federal proceedings or avoid disclosing psychiatric materials that could prejudice his October federal trial on stalking charges. This decision directly impacts the severity of potential penalties he faces and reflects the complex legal calculations in a high-profile case involving insurance industry criticism.
Timeline & Sources
Dec 4, 2024
WireBrian Thompson shot and killed in Manhattan
Dec 9, 2024
WireLuigi Mangione arrested in Altoona, Pennsylvania
Jun 3, 2026
WireSecret hearing held on psychiatric defense
Jun 17, 2026
WireMangione's lawyers announce intention to pursue psychiatric defense
Jun 18, 2026
WireJudge orders unsealing of hearing transcript; Mangione's lawyers withdraw psychiatric defense
Sep 8, 2026
WireState trial scheduled to begin
Oct 13, 2026
WireFederal trial scheduled to begin